video system not initialized pytgame code example

Example: for e in p.event.get(): pygame.error: video system not initialized

import pygame as p
import sys

p.init()
screen = p.display.set_mode((800, 800))

while True:
    for e in p.event.get():
        if e.type == p.QUIT:
            p.quit()
            sys.exit(1)