pygame – I always get "uninitialized video system" I do not understand where I was wrong

import pygame
pygame.init ()

width of display = 800
display_height = 600

gameDisplay = pygame.display.set_mode ((display_width, display_height))
pygame.display.set_caption (4 images: 1 word: ASTRONOMY VERSION & # 39;)

black = (0,0,0)
white = (255,255,255)
red = (255,0,0)
green = (0.255,0)
blue = (0,0,255)

answered = False
satImg1 = pygame.image.load (Start menu Programs Python 3.7 img satellite.png Users andrea AppData Roaming Microsoft Windows Start Programs

def satImg (x, y):
gameDisplay.blit (satImg1, (x, y))

x = (screenwidth * 1.0)
y = (display_height * 1.5)

without answer:
if pygame.mixer.get_busy ()! = None:
for the event in pygame.event.get ():
if event.type == pygame.QUIT:
answered = true
gameDisplay.fill (white)
satImg1 = (x, y)
pygame.quit ()
to leave()