rholder/retrying — pull request #31 by jobevers (2014-12-12 23:06:41+00:00)
Title: require six >= 1.7

retrying uses six.wraps, which requires at least version 1.7: https://bitbucket.org/gutworth/six/src/35f6d89f826f63486214e4746af028ccaa088901/six.py?at=1.7.0#cl-689