python3環境でvimで以下のようなエラーが出てpowerlineがうまく動かないことがあった(fedora). ちなみに別環境(ubuntu)だと同じ設定でもちゃんと動いたりしてた.

Traceback (most recent call last):
  File "<string>", line 9, in <module>
ImportError: No module named powerline.vim
An error occurred while importing powerline module.
This could be caused by invalid sys.path setting,
or by an incompatible Python version (powerline requires
Python 2.6, 2.7 or 3.2 and later to work). Please consult
the troubleshooting section in the documentation for
possible solutions.
Unable to import powerline, is it installed?
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