[Pythonmac-SIG] PYTHONPATH in Mac OS X App

Drew McCormack drewmccormack at mac.com
Wed Sep 17 14:41:15 EDT 2003

I am tackling my first attempt to create a python interface to a C++ 
library, using SWIG.

I have a couple of problems. The first is that I am not sure how to 
create a shared object (eg pplot.so). I can work around this, but if 
someone can tell me, I'd appreciate it.

The second, more serious problem, occurs when I try to embed python in 
a Cocoa app. I have everything setup OK so that I can run a python 
script by passing it as a string to Py_RunSimpleString. But I am having 
trouble loading my C++ library. To do this I need to load the module 
'pplot.py'. If I put this somewhere in PYTHONPATH, there is no problem. 
But I want to include pplot.py in my App bundle, and it doesn't get 
found there if I write 'import pplot' in my embedded script, because 
pplot.py is not in PYTHONPATH.

My question is, what is the best way to load pplot.py from a directory 
in my app bundle? I would rather not hard code a path, because I want 
to be able to install my app anywhere. So I would prefer a solution 
that allows me to set the path to pplot.py at run time.

I can think of diverse solutions, but I don't know which would be the 
best approach. I need the council of a more experienced Python 


Dr. Drew McCormack
Trade Strategist (www.trade-strategist.com)
Stock Market strategy design platform for Mac OS X.

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