Installation $ [sudo] pip install detect Features OS variables variable description detect.freebsd True if OS is FreeBSD detect.linux True if OS is Linux detect.mac True if OS is MacOS detect.osx True if OS is MacOS OS X detect.windows True if OS is Windows detect.cygwin True if OS is Cygwin detected detect.unix True if OS is Unix (not Windows) Python variables variable description detect.py2 True if python is 2.x detect.py3 True if python is 3.x Docker variable description detect.docker True if running inside a Docker container readme42.com