How to distribute an additional DLL to site-packages?

[Bo Peng]

Dear Python experts,

I am writing a python extension module that needs to link with a 
third-party DLL. How can I copy this DLL to the site-packages directory 
along with my extension modules? It seems that data_files parameter can 
do this, but I do not know how to get the absolute destination 
directory. After all, this directory is configurable.

I guess I need to determine /path/to/site-package for

setup(
     ...
     ext_modules = [...]
     data_files = [ ('/path/to/site-package', ['mydll.dll]) ]
)

using something like distutil.config.get_dest_dir().

Many thanks in advance.
Bo