Python mouse mover for screen saver suppression

mmove.py

"""
Using mouse events rather than just moving the cursor is important
"""

import sys
import time
import win32api
import win32con

last = -1

while True:
    for i in range(4):
        last *= -1
        x, y = win32api.GetCursorPos()
        x += 5*last
        y += 5*last
        nx = x*65535/win32api.GetSystemMetrics(0)
        ny = y*65535/win32api.GetSystemMetrics(1)
        win32api.mouse_event(
            win32con.MOUSEEVENTF_ABSOLUTE |
            win32con.MOUSEEVENTF_MOVE,
            nx, ny
        )
        time.sleep(0.1)
    print time.asctime(), x, y

    time.sleep(30)