[Python-Dev] Preventing 1.5 extensions crashing under 1.6/2.0 Python

[Jack Jansen]

Excuse my ignorance, but isn't the whole problem that the python 1.6
DLL is in the system search path even when you are running Python 1.7?

MacPython solves this problem by keeping the PythonCore dll in the
application directory, so it'll be found by a Python executable in the 
same directory but not by a python executable living elsewhere. And
even if you import a dynamic module that was meant for and older or
newer version of Python you'll get a decent error message: because all 
PythonCore's have the same name the imported module will link against
the one already loaded and complain bitterly about missing externals
(all assuming the current PythonCore and the module aren't
compatible).

This is a bit of a simplification, because MacOS doesn't really use
the dll filename for matching the library, and there are extreme cases 
where you can end up with two PythonCore's in one process (but they
don't happen to the average user), but this is the general idea....
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