The .pyc file apparently caches the entire path of the source file during 
compilation, causing it to report improper path information if the 
resulting code is moved and an exception occurs.

$ python
Python 2.3.3 (#1, Oct 18 2004, 16:10:24) 
[GCC 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, pie-8.7.6)] 
on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>