The requirement: Wait until the workstation is unlocked before doing something. This might seem like a slightly odd requirement, but someone did in fact request it on the python-win32 list. In any case, it illustrates a small use of the Win32 Desktop functionality which would otherwise have gone unexplored (by me).
The approach relies on the fact that an attempt to switch to a desktop which is locked will fail. So, get a handle to the default desktop and try to switch to it. If you can't, wait a bit and try again.
import time import ctypes user32 = ctypes.windll.User32 OpenDesktop = user32.OpenDesktopA SwitchDesktop = user32.SwitchDesktop DESKTOP_SWITCHDESKTOP = 0x0100 user32.LockWorkStation () # # Slight pause to overcome what appears to # be a grace period during which a switch # *will* succeed. # time.sleep (1.0) while 1: hDesktop = OpenDesktop ("default", 0, False, DESKTOP_SWITCHDESKTOP) result = SwitchDesktop (hDesktop) if result: print "Unlocked" break else: print time.asctime (), "still locked" time.sleep (2)