Python - if/else statements

[dmbkiwi]

On Sun, 13 Jul 2003 03:59:53 +0000, Bengt Richter wrote:

> On Sun, 13 Jul 2003 12:30:52 +1200, dmbkiwi <dmbkiwi at yahoo.com> wrote:
> 
>>On Sat, 12 Jul 2003 23:11:20 +0000, Bengt Richter wrote:
>>
>>> On Sat, 12 Jul 2003 14:27:33 +1200, dmbkiwi <dmbkiwi at yahoo.com> wrote:
>>> 
>>>>On Sat, 12 Jul 2003 01:58:13 +0000, Bengt Richter wrote:
>>>>
>>> [...]
>>> Is it a single .py file?
> BTW, since you uploaded it, is there an URL for it?

http://www.kdelook.org/content/show.php?content=6384

>>
>>Yes, although it imports a module called karamba (see my original post -
>>this is a theme run through a theme engine called superkaramba).
>>
> Unfortunately that makes me imagine an engine in a theme park, maybe in
> Argentina ;-P IOW I know nothing about theme engines ;-)

Same here.  Don't know if it's a theme engine or not, but it seemed an
appropriate description.

> 
> 
>>
>>It is being executed through the superkaramba engine (written in c++ I
>>believe).  Not sure if I, or my users have enough gumption to do the
>>debugging you are referring to.  I have asked them to execute the script
>>which contains a number of print statements to verify that it is ignoring
>>the else statement.  Is there other debugging info that I should be
>>printing when running the script?
> Maybe write a little test of if/else that doesn't depend on any data that
> you don't control right in the test. E.g., since most of your tests test
> for == 1 or 0,
> 
>  >>> for testval in (0, 1, None, (), [], '', 'x'):
>  ...     if testval == 0: print '%r==0?'%(testval,), ...     else: print
>  'not %r==0?'%(testval,), ...     if testval == 1: print
>  '%r==1?'%(testval,), ...     else: print 'not %r==1?'%(testval,), ...    
>  if testval: print 'if %r?'%(testval,), ...     else: print 'not if
>  %r?'%(testval,), ...     print
>  ...
>  0==0? not 0==1? not if 0?
>  not 1==0? 1==1? if 1?
>  not None==0? not None==1? not if None? not ()==0? not ()==1? not if ()?
>  not []==0? not []==1? not if []?
>  not ''==0? not ''==1? not if ''?
>  not 'x'==0? not 'x'==1? if 'x'?
> 
> Everything should be true (with not prefixes considered).
> 
> If the if/else tests are not working right for local variables, maybe the
> results will be glitched. Also declare a global _with the rest, not a
> separate line_, say g_testval, and do another loop like the above with
> testval changed to g_testval everywhere. If either of these glitch, I'd
> bet on the global one, but I actually expect them both to work. It would
> make another data point though.
> 
> And just FTHOI, give them a version with 100% space indenting.
> 
> Then the question would be, if these tests work, why don't the tests in
> the original code. We could also ask users to run these tests in some
> simpler context -- what if they just run the above loops in a def test():
> (so there's a difference between local and global) with nothing more in
> the script than test() to invoke it? That must work from the console
> command line python, or they are totally FUBAR. But it's a data point on
> the no-errors side of the fence.
> 
> We could then break down the code into painfully primitive steps, and
> print (where does printing go, BTW? is stdout captured for you in a file?)
> the results of each step. Again if something is parsing and potentially
> modifying the code before executing, giving it something dead simple to
> parse might help. Can someone say if the code is given to the interpreter
> completely unmodified, so we can put that to rest?
> 
> In the meanwhile, if most users have no problem, maybe you have to make a
> table of user configurations -- versions of linux, bsd, python
> (multiversion? how last upgraded?), libraries? gcc stuff? etc. until a
> pattern emerges as to who has the problems and how they are different.
> 
> Maybe make a little script to capture all that info and make it easy for
> folks to give it to you. (I wouldn't try to make it automatically send an
> email without their informed consent, though ;-)
> 
> Regards,
> Bengt Richter

I'll contact the users, and see if they're up for it.

Matt