Cannot move objects in Pygame

Question

I cannot move objects in pygame, but from tutorials that I'm learning is everything okay. I am search it for very long time, so I am so frustrated. Can someone help? Here is my code:

xPlayer1 = 15
yPlayer1 = 250

xPlayer2 = 765
yPlayer2 = 250

width = 15
height = 100

velocity = 5

run = True

while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    pygame.time.delay(10)

    spriteColor = (255, 255, 255)

    key = pygame.key.get_pressed()

    def Player1():
        pygame.draw.rect(screen, spriteColor, pygame.Rect(xPlayer1, yPlayer1, width, height))

        if key[pygame.K_UP] and yPlayer1>0:
            yPlayer1 -= velocity           # Here is my problem (error "UnboundLocalError: 
                                             local variable 'yPlayer1' referenced before 
                                             assignment"

        if key[pygame.K_DOWN] and yPlayer1<500-height:
            yPlayer1 += velocity                      # Same problem as higher
    
        pygame.display.update()



    def Player2():
        pygame.draw.rect(screen, spriteColor, pygame.Rect(xPlayer2, yPlayer2, width, height))
        pygame.display.update()



    def Ball():
        pygame.draw.circle(screen, spriteColor, (400, 300), 5)
        pygame.display.update()

I have called Player1, Player2 and Ball

Cannot move objects in Pygame

0 Answers0