def uptime():
"""Returns a datetime.timedelta instance representing the uptime in a Windows 2000/NT/XP machine"""
import os, sys
import subprocess
if not sys.platform.startswith('win'):
raise RuntimeError, "This function is to be used in windows only"
cmd = "net statistics server"
p = subprocess.Popen(cmd, shell=True,
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
(child_stdin, child_stdout) = (p.stdin, p.stdout)
lines = child_stdout.readlines()
child_stdin.close()
child_stdout.close()
lines = [line.strip() for line in lines if line.strip()]
date, time, ampm = lines[1].split()[2:5]
#print date, time, ampm
m, d, y = [int(v) for v in date.split('/')]
H, M = [int(v) for v in time.split(':')]
if ampm.lower() == 'pm':
H += 12
import datetime
now = datetime.datetime.now()
then = datetime.datetime(y, m, d, H, M)
diff = now - then
return diff
if __name__ == '__main__':
print uptime()
