From nabble at traction.de  Mon Mar 28 16:28:17 2011
From: nabble at traction.de (phelix)
Date: Mon, 28 Mar 2011 07:28:17 -0700 (PDT)
Subject: [Idle-dev]  IDLE Extension - Prompt goes missing
Message-ID: <31258787.post@talk.nabble.com>


Hello!

I am trying to write an extension to add autocompletion for "self". It works
fine but there is one problem I just can't figure out. Whenever I hit enter
at the shell a couple of times the interpreter seems to be crashing. The
extension still runs fine but the prompt is not comming back. I tried it in
both python 2.62 and 3.2. Here is some example code, any suggestion welcome.

# # to config-extensions.def
# [TestExtension]
# enable=1
# enable_shell=0
# [TestExtension_bindings]
# toggle-test-extension=

debug = 1

if debug:
    import PyShell

UPDATEINTERVAL = 300

class TestExtension():
    def __init__(self, editwin):
        self.s_print("init0\n")
        self.editwin = editwin
        if editwin is None:  # subprocess and test
            return
        self.text = editwin.text

        self.text.after(UPDATEINTERVAL, self.timer_event)
        
        self.s_print("init1")

    def update(self):
        self.s_print("update1")

        #self.remote_control("get_the_calltip", "mint")
        self.remote_control("runcode", "1+1\n")
        
        self.s_print("update2\n")

    def remote_control(self, funcString, *args):
        try:
            rpcclt = self.editwin.flist.pyshell.interp.rpcclt
        except:
            rpcclt = None
        if not rpcclt:
            return(None)
        r = rpcclt.remotecall("exec", funcString,  args , {})
        return(r) 

    def s_print(self, stringy):
        "print to shell to debug"
        if debug:
            try:
                PyShell.flist.pyshell.write(stringy)        
            except:
                pass  

    def timer_event(self):
        self.update()
        self.text.after(UPDATEINTERVAL, self.timer_event)



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From tjreedy at udel.edu  Wed Mar 30 22:28:16 2011
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 30 Mar 2011 16:28:16 -0400
Subject: [Idle-dev] IDLE Extension - Prompt goes missing
In-Reply-To: <31258787.post@talk.nabble.com>
References: <31258787.post@talk.nabble.com>
Message-ID: <in03ot$908$2@dough.gmane.org>

On 3/28/2011 10:28 AM, phelix wrote:

> I am trying to write an extension to add autocompletion for "self". It works
> fine but there is one problem I just can't figure out. Whenever I hit enter
> at the shell a couple of times the interpreter seems to be crashing. The
> extension still runs fine but the prompt is not comming back. I tried it in
> both python 2.62 and 3.2. Here is some example code, any suggestion welcome.

I do not know anything about IDLE extensions. Where are they documented 
or explained?

-- 
Terry Jan Reedy


From taleinat at gmail.com  Thu Mar 31 08:13:47 2011
From: taleinat at gmail.com (Tal Einat)
Date: Thu, 31 Mar 2011 08:13:47 +0200
Subject: [Idle-dev] IDLE Extension - Prompt goes missing
In-Reply-To: <in03ot$908$2@dough.gmane.org>
References: <31258787.post@talk.nabble.com> <in03ot$908$2@dough.gmane.org>
Message-ID: <AANLkTikBM0moeP3Q26maZ3hmvf32waA6jRYFkO0cgAJv@mail.gmail.com>

On Wed, Mar 30, 2011 at 10:28 PM, Terry Reedy <tjreedy at udel.edu> wrote:

> On 3/28/2011 10:28 AM, phelix wrote:
>
>  I am trying to write an extension to add autocompletion for "self". It
>> works
>> fine but there is one problem I just can't figure out. Whenever I hit
>> enter
>> at the shell a couple of times the interpreter seems to be crashing. The
>> extension still runs fine but the prompt is not comming back. I tried it
>> in
>> both python 2.62 and 3.2. Here is some example code, any suggestion
>> welcome.
>>
>
> I do not know anything about IDLE extensions. Where are they documented or
> explained?


See Lib/idlelib/extend.txt for details on extensions.
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From taleinat at gmail.com  Thu Mar 31 08:25:30 2011
From: taleinat at gmail.com (Tal Einat)
Date: Thu, 31 Mar 2011 08:25:30 +0200
Subject: [Idle-dev] IDLE Extension - Prompt goes missing
In-Reply-To: <31258787.post@talk.nabble.com>
References: <31258787.post@talk.nabble.com>
Message-ID: <AANLkTinsf3p+RXJxxFJkjecxeaw6cVZ0Ostb1Y8UO0G5@mail.gmail.com>

On Mon, Mar 28, 2011 at 4:28 PM, phelix <nabble at traction.de> wrote:

>
> Hello!
>

Hi,


> I am trying to write an extension to add autocompletion for "self".


Have you tried adding this functionality to the existing AutoComplete
extension? That could save you a lot of work and would be the best way to do
it.


> It works
> fine but there is one problem I just can't figure out. Whenever I hit enter
> at the shell a couple of times the interpreter seems to be crashing. The
> extension still runs fine but the prompt is not comming back. I tried it in
> both python 2.62 and 3.2. Here is some example code, any suggestion
> welcome.
>
> [snip]

Well, your code is doing a lot of things for which I don't understand the
reasons.

The best tip I can give you is to run IDLE from the command line (on
Windows, C:\Python32\python.exe C:\Python32\Lib\idlelib\idle.py). Then you
can see output and exceptions printed to the command console. You could also
print your own debugging info using "print" instead of using that s_print
function, and it won't show up in IDLE's shell, just in the command console.

Finally, if you're going for completions in the editor, check out the Rope
package which supplies some awesome code-analysis tools.

- Tal
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From nabble at traction.de  Thu Mar 31 10:01:06 2011
From: nabble at traction.de (phelix)
Date: Thu, 31 Mar 2011 01:01:06 -0700 (PDT)
Subject: [Idle-dev] IDLE Extension - Prompt goes missing
In-Reply-To: <AANLkTinsf3p+RXJxxFJkjecxeaw6cVZ0Ostb1Y8UO0G5@mail.gmail.com>
References: <31258787.post@talk.nabble.com>
	<AANLkTinsf3p+RXJxxFJkjecxeaw6cVZ0Ostb1Y8UO0G5@mail.gmail.com>
Message-ID: <31284056.post@talk.nabble.com>


>> I am trying to write an extension to add autocompletion for "self".
>Have you tried adding this functionality to the existing AutoComplete
>extension? That could save you a lot of work and would be the best way to
do
>it.
I took a good look at it and also at CodeContext and learned a lot from it.
But it was easier to put it into its own extension and seemed cleaner to me.
Of course the completions show up in AutoComplete. What it does is that it
simply points a global Reference "self" to the classname(s) it finds in the
editor above the cursor.

>> It works
>> fine but there is one problem I just can't figure out. Whenever I hit
>> enter
>> at the shell a couple of times the interpreter seems to be crashing. The
>> extension still runs fine but the prompt is not comming back. I tried it
>> in
>> both python 2.62 and 3.2. Here is some example code, any suggestion
>> welcome.
>Well, your code is doing a lot of things for which I don't understand the
>reasons.
I should have been a little more verbose. In the update method there are two
example lines for a call I need to do to install the class reference: 

        #self.remote_control("get_the_calltip", "mint")  # this strategy
would require to alter idle-code
        self.remote_control("runcode", "1+1\n") 

With either of them I am having the problem of the disapearing prompt.
Something similiar works fine from within the CodeContext extension so
probably I am missing something here. I will investigate further.

>The best tip I can give you is to run IDLE from the command line (on
>Windows, C:\Python32\python.exe C:\Python32\Lib\idlelib\idle.py). Then you
>can see output and exceptions printed to the command console. You could
also
>print your own debugging info using "print" instead of using that s_print
>function, and it won't show up in IDLE's shell, just in the command
console.
I figured this out by coincidence just after I had posted this question.
Though it seems very obvious to me know this is a very good hint and should
by all means be included in the extend.txt file or on some website about
IDLE Development.

=Phelix=
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From nabble at traction.de  Thu Mar 31 16:10:43 2011
From: nabble at traction.de (phelix)
Date: Thu, 31 Mar 2011 07:10:43 -0700 (PDT)
Subject: [Idle-dev] IDLE Extension - Prompt goes missing
In-Reply-To: <31284056.post@talk.nabble.com>
References: <31258787.post@talk.nabble.com>
	<AANLkTinsf3p+RXJxxFJkjecxeaw6cVZ0Ostb1Y8UO0G5@mail.gmail.com>
	<31284056.post@talk.nabble.com>
Message-ID: <31286762.post@talk.nabble.com>


ok, finally I got it. 

I fell for a bug that Noam Raphael pointed out and supplied a patch for
eight years ago (http://old.nabble.com/Fix-freezes!-td1182996.html). It is
still present in Idle 3.2. I guess IDLE development really is slow =) - this
must change!

The problem was that my calls desynced the message loop, though they should
not have.

I will post my extension here after a little testing, though it will only
work with this bug patched.

=Phelix=

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From taleinat at gmail.com  Thu Mar 31 22:54:11 2011
From: taleinat at gmail.com (Tal Einat)
Date: Thu, 31 Mar 2011 22:54:11 +0200
Subject: [Idle-dev] IDLE Extension - Prompt goes missing
In-Reply-To: <31284056.post@talk.nabble.com>
References: <31258787.post@talk.nabble.com>
	<AANLkTinsf3p+RXJxxFJkjecxeaw6cVZ0Ostb1Y8UO0G5@mail.gmail.com>
	<31284056.post@talk.nabble.com>
Message-ID: <AANLkTinuuZefa4gmYJibsbRPUTOiqm-bE9s4+ZNgMWht@mail.gmail.com>

On Thu, Mar 31, 2011 at 10:01 AM, phelix wrote:

>
> >> I am trying to write an extension to add autocompletion for "self".
> >Have you tried adding this functionality to the existing AutoComplete
> >extension? That could save you a lot of work and would be the best way to
> >do it.
> I took a good look at it and also at CodeContext and learned a lot from it.
> But it was easier to put it into its own extension and seemed cleaner to
> me.
> Of course the completions show up in AutoComplete. What it does is that it
> simply points a global Reference "self" to the classname(s) it finds in the
> editor above the cursor.
>

For your own good and for the good of IDLE, I urge you to try implementing
this by improving AutoComplete. Your approach (as I understand it) both
requires first fixing a delicate bug regarding IDLE's event handling and
messes around with the Shell's namespace. I don't think you will manage to
get such a patch accepted.

>The best tip I can give you is to run IDLE from the command line (on
> >Windows, C:\Python32\python.exe C:\Python32\Lib\idlelib\idle.py). Then you
> >can see output and exceptions printed to the command console. You could
> also
> >print your own debugging info using "print" instead of using that s_print
> >function, and it won't show up in IDLE's shell, just in the command
> console.
>
I figured this out by coincidence just after I had posted this question.
> Though it seems very obvious to me know this is a very good hint and should
> by all means be included in the extend.txt file or on some website about
> IDLE Development.
>

Good point.

If you submit a patch which updates extend.txt appropriately, I'll review
it.

- Tal
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