Greetings, everyone. Please excuse this question's elementary nature... Neither web searching nor experimentation has yielded a solution thus far, and doubtless someone here will be able to answer it right away.

I have developed a PyQt4 application on my Ubuntu machine, and it works fine, no problems. Now I want another user to be able to use it on his Windows XP machine, so on his computer I do the following, in this order:

1.  Install Python 2.6
2.  Install the PyQt4 for Python 2.6

Both installations were successful, and I can run the PyQt example programs that are installed. Also I can see, in the Python installation directory, that Lib/site-packages/PyQt4 exists and has appropriate-looking stuff in it.

And yet -- I bet you can see this coming -- I cannot get my application to execute. Doubleclicking on my_app.py produces an instantaneously visible DOS shell and no application, and renaming the file to my_app.pyw also has no effect (less the flashing DOS shell). Entering a DOS shell and trying to run the program from there by means of a "python my_app.py" command simply results in:

Traceback (most recent call last):
  File "my_app.py", line 2, in <module>
    from PyQt4 import QtCore, QtGui
ImportError: No module named PyQt4

So is this merely an issue of an undefined PYTHONPATH variable, or similar? I was expecting that things in Lib/site-packages would be automatically visible to Python... Is this not the case?

I'm sure I'm missing something very simple.  Thoughts?

Thanks,
Doug

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