$ git ls-files | grep py$ | xargs pyflakes
subcmds/stage.py:101: list comprehension redefines 'p' from line 63
subcmds/sync.py:784: list comprehension redefines 'p' from line 664
subcmds/upload.py:467: list comprehension redefines 'avail' from line 454
Change-Id: Ia65d1a72ed185ab3357e1a91ed4450c719e75a7c