[pyGame] My First Test, Error Fount !

[metulburr]

It needs to be a sequence such as a tuple is what most people use

screen = pygame.display.set_mode((640, 480))

https://www.pygame.org/docs/ref/display.html#pygame.display.set_mode

Also make sure you add a clause to close for the little X on the windows via pygame.QUIT. And its better to loop events and close on such events, as well as put your screen fill and screen updates in the main game loop to update. An example below...

import pygame

screen = pygame.display.set_mode((800,600))
done = False

while not done:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                done = True
        
    screen.fill((255,255,255))
    pygame.display.update()