My Pygame Character Is Not Moving Continuously [duplicate]

now I would suggest changing the way of registering button presses (I cannot tell if it is better but someone had similar problem and it helped him):

while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit()
        
    
    keys = pygame.key.get_pressed()
    if keys[pygame.K_q]:
        # [...]
    if keys[pygame.K_a]:
        # [...]
    if keys[pygame.K_LEFT]:
        # [...]

and so on