[Pythonmac-SIG] Py2app zlib import error

[Ronald Oussoren]

On 23 Jun, 2011, at 18:18, Brian Zambrano wrote:

> It smells of a py2app issue to me as well...something with the path settings.

Something else to try:  there is an __boot__.py inside the generated application bundle. Add the following line to the top of that file:

import sys; print (sys.path)

Then launch the application from the command-line: dist/test2pyapp.app/Contents/MacOS/testpy2app

This should print the value of Python's search path in the terminal.   The entries of that list should refer to ".../Resources/lib/python2.6", ".../Resources/lib/python2.6/lib-dynload" and ".../Resources/lib/python2.6/site-packages.zip".

Given your problem sys.path either doesn't contain the lib-dynload entry, or the lib-dynload entry is after the entry for site-packages.zip.     Both of which would be bugs in py2app.

As a quick workaround it should be possible monkeypatch sys.path in __boot__.py, that way you can at least launch the application while we look for a proper solution.

Ronald

> 
> I don't have macports installed on this machine, so that's definitely not it.
> 
> The exact same error happens when doing a hello world program with py2app.  The setup file, unaltered:
> 
> """
> This is a setup.py script generated by py2applet
> 
> Usage:
>     python setup.py py2app
> """
> 
> from setuptools import setup
> 
> APP = ['testpy2app.py']
> DATA_FILES = []
> OPTIONS = {'argv_emulation': True}
> 
> setup(
>     app=APP,
>     data_files=DATA_FILES,
>     options={'py2app': OPTIONS},
>     setup_requires=['py2app'],
> )
> 
> Launching the compiled app throws the same zlib error.  I guess I'll need to start digging through py2app source and figure out where this bug is coming from.
> 
> BZ
> 
> 
> On Thu, Jun 23, 2011 at 9:04 AM, Chris Barker <Chris.Barker at noaa.gov> wrote:
> On 6/22/11 7:30 PM, Brian Zambrano wrote:
> Just bumping this.  Does anyone have solution or some advice on how to
> proceed?
> 
>    The error is:
> 
>    'import site' failed; use -v for traceback
> ...
> 
>    zipimport.ZipImportError: can't decompress data; zlib not available
> 
> This looks like it has nothing to do with PyQT or anything else, actually, but is a raw py2app issue. So the first thing I'd do is try a really simple example. That will make it easier for others to try and reproduce the failure as well.
> 
> Taking a guess, I'd say you're getting a zlib from macports that may rely on something else in macports that other users don't have.
> 
> Again, I"'d avoid macports for something you want to re-distribute.
> 
> 
> -Chris
> 
> 
> 
> -- 
> Christopher Barker, Ph.D.
> Oceanographer
> 
> Emergency Response Division
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> 
> Chris.Barker at noaa.gov
> 
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