How do I check the operating system in Python?

Question

I want to check the operating system (on the computer where the script runs).

I know I can use os.system('uname -o') in Linux, but it gives me a message in the console, and I want to write to a variable.

It will be okay if the script can tell if it is Mac, Windows or Linux. How can I check it?

Answer 1

You can use sys.platform:

from sys import platform
if platform == "linux" or platform == "linux2":
    # linux
elif platform == "darwin":
    # OS X
elif platform == "win32":
    # Windows...

sys.platform has finer granularity than sys.name.

For the valid values, consult the documentation.

See also the answer to “What OS am I running on?”