Inside Out | Patch: metaclass conflict in comtypes for python 3.3.2

Patch: metaclass conflict in comtypes for python 3.3.2

August 2013

ℹ️ A temporary patch is available for an issue in Python 3.3.2 on Windows 8, which involves a stacktrace and metaclass conflict.

You’d see following stacktrace (issue reported here↗). Until we have an official fix, a temporary patch is available on this gist↗. Tested on Python 3.3.2 (x86)/Windows 8. Enjoy!

File "C:\Python33\lib\site-packages\comtypes\__init__.py", line 1049, in class IUnknown(object, metaclass=_cominterface_meta): File "C:\Python33\lib\site-packages\comtypes\__init__.py", line 281, in __new__ class _(partial.partial, POINTER(p)): TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases