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>If you move the files to a different machine, you will need to 
delete the .pyc files.

In my case, the files are not moved between machines.  They are 
referenced by both Windows and UNIX systems simultaneously.  
The platform that references the .py file first will generate the 
.pyc, so we have a mixture of UNIX and Windows paths embedded 
in the .pyc files.  In the case when we deliver python scripts, we 
only deliver compiled python files.