Comment 1 for bug 1283742

Ah yes, I know the reason for that. It's due to the new signature changes in Python 3.4 - some builtin objects are now introspectable with inspect.getfullargspec but don't have the full range of "normal" attributes. The fix is just to catch the AttributeError around copying them. FWIW mock is *included* in Python 3.4 as unittest.mock, so nothing using Python 3.4 should be using the python-mock package!