pyflakes/pyflakes — pull request #17 by timothycrosley (2013-12-01 17:33:27+00:00)
Title: Update checker.py

There is a standard way to determine the version of Python2, using builtins as a check, breaks if any modules included in users installation override this module. For example if they have any utilities installed that use pies: https://github.com/timothycrosley/pies