datastax/python-driver — pull request #197 by victorpoluceno (2014-09-22 20:00:05+00:00)
Title: Makes execute_concurrent function compatible with Python 2.6

Start param was first introduced as keyword argument in Python 2.7, before that it was a positional argument. This fixes makes `execute_concurrent` function compatible with Python 2.6 as well as Python 2.7.