gistfile1.txt

python_version	download_count
3.6	  17276
2.7	  13728
null	12301
3.5	  5049
3.4	  2202
3.2	  306
3.7	  240
1.17	55
3.3	  34
2.6	  8

With client pip:

details_system_name | python_version | download_count
-- | -- | --
Windows | 3.6 | 11562
Linux | 2.7 | 5920
Windows | 2.7 | 3953
Darwin | 2.7 | 3345
Linux | 3.6 | 3147
Linux | 3.5 | 3059
Darwin | 3.6 | 2357
Windows | 3.5 | 1576
Linux | 3.4 | 1074
Windows | 3.4 | 998
Darwin | 3.5 | 390
Windows | 3.7 | 227
Darwin | 3.4 | 120
Windows | 3.3 | 22
Linux | 3.3 | 8
Linux | 2.6 | 8
Darwin | 3.7 | 7
CYGWIN_NT-6.1 | 2.7 | 6
FreeBSD | 3.6 | 5
CYGWIN_NT-10.0 | 2.7 | 5
CYGWIN_NT-10.0 | 3.6 | 4
Linux | 3.7 | 4
CYGWIN_NT-6.3 | 2.7 | 3
Darwin | 3.3 | 3
MSYS_NT-10.0 | 3.6 | 2
OpenBSD | 2.7 | 2
Java |   | 1
Windows | 3.2 | 1
CYGWIN_NT-6.1-WOW | 3.6 | 1
Haiku | 3.6 | 1
CYGWIN_NT-6.1 | 3.6 | 1
MINGW64_NT-6.1 | 2.7 | 1
CYGWIN_NT-6.1-WOW | 2.7 | 1
MINGW32_NT-10.0-WOW | 3.6 | 1
CYGWIN_NT-10.0-WOW | 2.7 | 1