crossplatform py2exe - would it be useful?

Alex Martelli aleax at aleax.it
Thu Aug 7 20:29:44 CEST 2003


Thomas Heller wrote:

> Alex Martelli <aleax at aleax.it> writes:
> 
>> Thomas Heller wrote:
>>    ...
>>>>> myscript -c "import sys; sys.path.insert(0, sys.executable); import
>>>>> foo"
>>    ...
>>>> Sounds like a good idea to me, if a sensible name is chosen for the
>>>> "main module" (I propose 'main':-).
>>> 
>>> My choice would have been __main__ :-) Is it really the correct way to
>>> 'import __main__' instead of 'running' it?
>>
>> Well, most main scripts ARE coded with the "if __name__=='__main__':"
>> convention, after all, so an "import __main__" can be seen as a way
>> to just piggyback on that existing convention rather than inventing a
>> new one in addition.  So, I concede it's better than "import main".
>>
> 
> How would the hook be triggered? The zipimporter code would probably add
> argv[0] to sys.path, and then try to 'import __main__' or something like
> this. The problem is that a standalone executable python would have to
> disable the standard Python command line flags and environment
> variables, but they are parse *before* Py_Initialize() is called.

Ah, yes, good point.  So, the executable needs to know whether to do
the usual commandline and environment processing, or not, _before_
calling Py_Inizialize.  One approach might be to trigger this based
on the executable's own *name* -- do the full commandline and environment
processing if and only if the executable's name starts with (case-
insensitive, probably, to be safe...) the six letters 'python', but
not otherwise.  There are, no doubt, other alternative ways, too, but
this one seems dirt-simple and practically sufficient.


> And I hope that the options set by the command line flags and env vars
> should now come from the __main__ script itself.

I'm not sure I understand what you mean.  Anyway, I do see that if
my 'foobar.exe' is a python.exe + appended zipfile, then running
'foobar -i' should just put '-i' in sys.argv[1], and NOT gobble it up
to mean "enter interactive mode", for example.


Alex





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