Whatsapp sender automatic

#!/usr/bin/python3
import pyautogui as pyag
import sys


def setup(msg='Mensagem padrão', times=3):
    pos = pyag.locateCenterOnScreen('images/send.png', grayscale=True)
    if pos is not None:
        pyag.click(pos)
        for i in range(times):
            pyag.typewrite(msg)
            pyag.press('enter')

time_start = sys.argv.index('-t')
phrase = " ".join(sys.argv[1:time_start])
time = int(sys.argv[time_start+1])
setup(phrase, time)