Comment 3 for bug 1813938

I my environment:

$ python
Python 2.7.14 (default, Oct 31 2017, 21:12:13)
[GCC 6.4.0] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> print sys.platform
cygwin
>>> exit()

And the url for sys_platform: https://docs.python.org/2/library/sys.html#sys.platform