How do I get my image in python to appear?

user_14386130 0
Viewed 45

I have code that moves my beach ball image 1 with wrapping around the edges. When I run the code, I do not get any errors but a blank black screen appears without the ball. When I exit out of the program, the image of the ball appears for a second before closing the program.

import pygame, sys
pygame.init()
screen=pygame.display.set_mode([640,640])
screen.fill([0, 0, 0])
my_ball = pygame.image.load("ball.png")
x=0
y=0
x_speed=5
running=True
while running:
    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            running=False
    pygame.time.delay(20)
    pygame.draw.rect(screen, [0,0,0], [x, y, 0, 0], 0)
    x=x+x_speed
if x>screen.get_width():
    x=0
screen.blit(my_ball,[x, y])
pygame.display.flip()
pygame.quit()
pygame python-3.x python
2 Answers

You should put

screen.blit(my_ball,[x, y])
pygame.display.flip()

inside the while loop like this:

while running:
    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            running=False
    pygame.time.delay(20)
    pygame.draw.rect(screen, [0,0,0], [x, y, 0, 0], 0)
    x=x+x_speed
    screen.blit(my_ball,[x, y])
    if x>screen.get_width():
        x=0

    pygame.display.flip()

and probably the if statement as well

also instead of

pygame.draw.rect(screen, [0,0,0], [x, y, 0, 0], 0)

you can simply use

screen.fill((0, 0, 0))

which just fills the screen with specified color

user_145310620

The screen is staying black because the drawing operations are never flushed to the display.

Your code has a simple indentation bug, everything from if x>screen... to pygame.display.flip() (inclusive) should be part of the while running loop.

e.g.:

while running:
    for event in pygame.event.get():
        if event.type==pygame.QUIT:
            running=False
    #pygame.time.delay(20)    # don't delay the main loop, use clock.tick()

    pygame.draw.rect(screen, [0,0,0], [x, y, 0, 0], 0)

    x=x+x_speed
    if x>screen.get_width():
        x=0
    screen.blit(my_ball,[x, y])
    pygame.display.flip()

pygame.quit()
user_17308950
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