pydata/pandas — pull request #4251 by jtratner (2013-07-16 02:52:45+00:00)
Title: CLN: Remove unused and cleanup imports throughout.

Cleans up imports throughout pandas, removing unused and reordering to
better match PEP8 where reasonable. Thanks to PyCharm for making this much
easier. Doesn't change any .pyx or .pyd files. (inspired by import issue
in #4249)