Clarify different calls for Python 2.7 and Python 3.
Clarify different calls for Python 2.7 and Python 3.

gfyoung/hosts,WillPresley/hosts,FrancoGag/hosts,FrancoGag/hosts,WillPresley/hosts,StevenBlack/hosts,maxmurder/hosts,bmcculley/hosts,maxmurder/hosts,gfyoung/hosts,StevenBlack/hosts,borisschapira/hosts