[Python-Dev] Importing DLLs on Windows

[M.-A. Lemburg]

Python or Windows seems to have trouble importing DLLs when
inside packages. I'm working on an extension which pulls in a
DLL gmp31.dll which lives inside a package dir mx/Number/mxNumber
along side the Python wrapper extension mxNumber.pyd.

Currently, I'm using this code in the subpackage's __init__.py:

# On Windows we also distribute the GMP DLL (in the win32 subdir). To
# have Win32 find the DLL we need to be explicit about the path in
# sys.path though. This trick works for all startup directories
# *except* \PythonXX (for some reason this fails), but is not thread
# safe...
import sys, os
if sys.platform[:3] == 'win':
    abspath = os.path.abspath(__path__[0])
    sys.path.insert(0, abspath)
    from mxNumber import *
    sys.path.remove(abspath)

else:
    from mxNumber import *


I don't have any clue why the import works from everywhere *except*
the Python21 install directory... anyone does ?

Thanks,
-- 
Marc-Andre Lemburg
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