Move aim CS:GO Python 2.7

Question

Trying to make a simple spray control script for cs:go (for educational purpose) I'm using pyHook to activate a function that moves the mouse in a pattern. It works great outside of cs:go for example in paint but only make the aim lagg for half a second when ingame. Any tips for making it work?

import pyHook
import pythoncom
import pyautogui
import time

time.sleep(10) 
def onclick(event):
    pyautogui.dragTo(660, 540)

    return True

hm = pyHook.HookManager()
hm.SubscribeMouseAllButtonsDown(onclick)
hm.HookMouse()
pythoncom.PumpMessages()
hm.UnhookMouse()