Sample code in Python to detect idle time

idle.py

import sys

if sys.platform == 'win32':
    from ctypes import *
    
    class LASTINPUTINFO(Structure):
        _fields_ = [
            ('cbSize', c_uint),
            ('dwTime', c_int),
        ]
        
    def get_idle_duration():
        lastInputInfo = LASTINPUTINFO()
        lastInputInfo.cbSize = sizeof(lastInputInfo)
        if windll.user32.GetLastInputInfo(byref(lastInputInfo)):
            millis = windll.kernel32.GetTickCount() - lastInputInfo.dwTime
            return millis / 1000.0
        else:
            return 0
else:
    def get_idle_duration():
        return 0
        
if __name__ == '__main__':
    import time
    while True:
        duration = get_idle_duration()
        print 'User idle for %.2f seconds.' % duration
        time.sleep(1)

so if the system is not windows, it will always return saying the idle time is 0, even if it isn't?

Just applied to my script in Python 3.7
If people are curious here is my code for 3.7+ users

'if sys.platform == 'win32':
    from ctypes import Structure, windll, c_uint, c_int, sizeof, byref
    
    class LASTINPUTINFO(Structure):
        _fields_ = [
            ('cbSize', c_uint),
            ('dwTime', c_int),
        ]
        
    def get_idle_duration():
        lastInputInfo = LASTINPUTINFO()
        lastInputInfo.cbSize = sizeof(lastInputInfo)
        if windll.user32.GetLastInputInfo(byref(lastInputInfo)):
            millis = windll.kernel32.GetTickCount() - lastInputInfo.dwTime
            return millis / 1000.0
        else:
            return 0
else:
    def get_idle_duration():
        return 0
        
if __name__ == '__main__':
    import time
    while True:
        duration = str(get_idle_duration())
        print('User idle for seconds.' + duration)
        time.sleep(1)`