Python in C integration and WxPython

[Alain Paschoud]

Hi all,

I made a small dialog in WxPython. I can run the python script with a
double-click or through command line, and everything goes fine (dialog
appears, which means that wx module has been found).
Then, I decided to write a C program (under Windows, with Cygwin) that
will read my script (through PyRun_SimpleFile() function) and run it.
But the system doesn't find the wx module to import...

Traceback (most recent call last):
File "Dialog.py", line 2, in ?
import wx
ImportError: No module named wx

How can I say to my program where to search for this module ? I tried to
set $PYTHONPATH and $PYTHONHOME, but this doesn't change anything.

More generally : Does a C program that embedded python run an external
executable (interpreter), or does it only load libraries ?

Thank you very much for any help on this topic.

Best regards.

[David Wilson]

It sounds like your C program and Python script are running under
different interpreters. Your C program almost certainly is using a
Python version that comes with Cygwin, while the script is probably
using a native win32 Python that has wxPython installed.

Assuming this is true, then compiling your C program natively on
Windows should solve the problem. Alternatively, if wxPython is
available for cygwin (possibly via cygwin's X server) then installing
it would also help.
David.
Alain Paschoud wrote:

Hi all,

I made a small dialog in WxPython. I can run the python script with a
double-click or through command line, and everything goes fine (dialog
appears, which means that wx module has been found).
Then, I decided to write a C program (under Windows, with Cygwin) that
will read my script (through PyRun_SimpleFile() function) and run it.
But the system doesn't find the wx module to import...

Traceback (most recent call last):
File "Dialog.py", line 2, in ?
import wx
ImportError: No module named wx

How can I say to my program where to search for this module ? I tried to
set $PYTHONPATH and $PYTHONHOME, but this doesn't change anything.

More generally : Does a C program that embedded python run an external
executable (interpreter), or does it only load libraries ?

Thank you very much for any help on this topic.

Best regards.

[Alain Paschoud]

Hi David,

Thanks for your answer, but I don't think the problem comes from which
Python version I use. I installed the Python from cygwin, but this
didn't change everything.

Finally, I fullfill the PYTHONPATH environment variable to make the
system finding the wx module. It is now able to find it. But after that,
the mode _core is called, and finally, the module _core_, which is not
found. The only _core_ file that I have is the "_core_.pyd" which is in
the wx directory. Of course, I added this directory path to PYTHONPATH,
but without any success.... is it because this is a .pyd file ?

Here are the logs I get:

Traceback (most recent call last):
File "Dialog.py", line 2, in ?
import wx
File "C:\Python24\Lib\site-packages\wx-2.6-msw-ansi\wx\__init__.py",
line 42, in ?
from wx._core import *
File
"/cygdrive/c/Python24/Lib/site-packages/wx-2.6-msw-ansi/wx/_core.py",
line 4, in ?
import _core_

Here is the result of the Py_GetPath() function:

/cygdrive/c/Python24/Lib/site-packages/:/cygdrive/c/Python24/Lib/site-packages
/wx-2.6-msw-ansi/:/cygdrive/c/Python24/Lib/site-packages/wx-2.6-msw-ansi/wxPython:/cygdriv
e/c/Python24/Lib/site-packages/wx-2.6-msw-ansi/wx:.:/usr/bin/lib/python24.zip:/usr/bin/lib
/python2.4/:/usr/bin/lib/python2.4/plat-cygwin:/usr/bin/lib/python2.4/lib-tk:/usr/bin/lib/
python2.4/lib-dynload

Any hints ??

Thanks.

N.B: Same problem when I run the script directly with "python -v Dialog.py".

David Wilson wrote:

It sounds like your C program and Python script are running under
different interpreters. Your C program almost certainly is using a
Python version that comes with Cygwin, while the script is probably
using a native win32 Python that has wxPython installed.

Assuming this is true, then compiling your C program natively on
Windows should solve the problem. Alternatively, if wxPython is
available for cygwin (possibly via cygwin's X server) then installing
it would also help.
David.
Alain Paschoud wrote:

Hi all,

I made a small dialog in WxPython. I can run the python script with a
double-click or through command line, and everything goes fine (dialog
appears, which means that wx module has been found).
Then, I decided to write a C program (under Windows, with Cygwin) that
will read my script (through PyRun_SimpleFile() function) and run it.
But the system doesn't find the wx module to import...

Traceback (most recent call last):
File "Dialog.py", line 2, in ?
import wx
ImportError: No module named wx

How can I say to my program where to search for this module ? I tried to
set $PYTHONPATH and $PYTHONHOME, but this doesn't change anything.

More generally : Does a C program that embedded python run an external
executable (interpreter), or does it only load libraries ?

Thank you very much for any help on this topic.

Best regards.