Move sprite in pygame without flickering

Question

So I've been playing around in pygame, and I can draw and use the update method to move my sprite, but when I clear the screen the sprite flickers. How do I move the sprite without the flickering

Here's the code:

class Sprite(pygame.sprite.Sprite):
    def __init__(self, pos):
        super(Sprite, self).__init__()
        self.image = demon
        self.rect = self.image.get_rect(center = pos)
    
    def update(self, moveX, moveY):
        self.rect.x += moveX
        self.rect.y += moveY
        screen.fill(BLACK)

Answer 1

The typical Pygame application loop has to:

• handle the events by either pygame.event.pump() or pygame.event.get().
• update the game states and positions of objects dependent on the input events and time (respectively frames)
• clear the entire display or draw the background
• draw the entire scene (blit all the objects)
• update the display by either pygame.display.update() or pygame.display.flip()

Remove screen.fill(BLACK) form update:

class Sprite(pygame.sprite.Sprite):
    # [...]
    
    def update(self, moveX, moveY):
        self.rect.x += moveX
        self.rect.y += moveY
        # screen.fill(BLACK)         <--- DELETE

Implement the following application loop (based on your previous question):

while carryOn == True:

    # handle events
    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            carryOn=False

    # update
    # [...]

    # clear display
    screen.fill(BLACK)

    # draw sprites
    all_sprites_list.draw(screen)

    # update display
    pygame.display.flip()
    clock.tick(60)