Why would you sort 2.6 in 2017?
Supporting 2.7 these days in a new package is already a bit of a wtf - Django for example drops support for it next year.
We're still maintaining stacks on py 2.6 which predate the reference platform specs
At least you're not trying to write Fortran compatible with the 77 and 90 specs....
We're still maintaining stacks on py 2.6 which predate the reference platform specs