scikit-image/scikit-image — pull request #483 by almarklein (2013-03-27 20:16:37+00:00)
Title: Create dummy WindowsError that is an actual Exception instead of None. 

The solution in pull request #383 does not work when an error occurs: "TypeError: catching classes that do not inherit from BaseException is not allowed"

This prevented me from installing scikit image on Python 3.3 and Mac OS X 10.6.2.

(please let me know if this is not the correct way to do a PR)