3 ways to check if running on Windows in Python

Using os module

In Python 3.6/3.7, you can use os module

os.name: The name of the operating system dependent module imported. The following names have currently been registered: ‘posix’, ‘nt’, ‘java’.

so if os.name is 'nt' means windows os:

import os

if os.name == 'nt':
     ...
Code language: JavaScript (javascript)

Using platform.system

 system()
        Returns the system/OS name, e.g. 'Linux', 'Windows' or 'Java'.

        An empty string is returned if the value cannot be determined.
Code language: PHP (php)

On a 64 bit machine, with Windows 7 (64 bit OS) this is the output:

 >>> print(sys.platform) 
    win32 
 >>> platform.win32_ver() 
 ('post2008Server', '6.1.7100', '', 'Multiprocessor Free')
Code language: PHP (php)

Using sys module

import sys
# its win32, maybe there is win64 too?
is_windows = sys.platform.startswith('win')
Code language: PHP (php)