Develop Reference

Pygame Window not Responding but no Error

I recently started learning pygame but I've had an error which shows pygame not responding after some time. It would really help if someone could find my bug! Here's my code:
import pygame
pygame.init()
screen = pygame.display.set_mode((800,600))
pygame.display.set_caption("Space Invaders")
BLUE = (0, 0, 255)
def player():
pygame.draw.rect(screen,BLUE,(200,150,100,50))
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
screen.fill((0,0,0))
pygame.display.update()

From my limited knowledge of pygame, it is likely that you set running = True and did a while True: statement, causing too much memory to be used and the script to crash after some time.
You need a proper termination that uses pygame.quit(), followed by sys.exit(). Setting running = False does not terminate the script.
Try this code:
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.display.quit()
pygame.quit()
sys.exit()
Reference

Try adding a pygame.quit() at the end of your code:
import pygame
pygame.init()
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("Space Invaders")
BLUE = (0, 0, 255)
def player():
pygame.draw.rect(screen, BLUE, (200, 150, 100, 50))
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
screen.fill((0,0,0))
pygame.display.update()
pygame.quit()

Need assistance with blit function

I am making a new game in pygame and the blit function just is not working for me, it should be simple but I just don't know what's wrong.
import pygame
import sys
pygame.init()
clock = pygame.time.Clock()
game = True
WIDTH = 160
HEIGHT = 144
screen = pygame.display.set_mode((WIDTH, HEIGHT), pygame.FULLSCREEN)
level = pygame.image.load('RBYG/Level.png')
def redrawGameWindow():
screen.blit(level, (0, 0))
while game:
screen.blit(level,(0, 0))
for event in pygame.event.get():
print(event)
if event.type == pygame.QUIT:
sys.exit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
sys.exit()
redrawGameWindow()
clock.tick(60)

You're missing pygame.display.flip(), you have to do that after you blit or nothing will happen. Your redrawGameWindow() function should flip the display. Also, you're calling screen.blit(level, (0, 0)) twice in your main loop, which may be unnecessary; try just keeping one of them (just make sure to flip() after).

How to make my pygame game window resizeable?

When I run this code the resizeable option is available but when I click on it to maximize the screen, there is this weird white outline that appears. How would I fix it?.
import pygame
pygame.init()
screen = pygame.display.set_mode((900, 500), pygame.RESIZABLE)
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
pygame.display.update()

You have to recreate the display Surface in the VIDEORESIZE event (see pygame.event):
import pygame
pygame.init()
screen = pygame.display.set_mode((900, 500), pygame.RESIZABLE)
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.VIDEORESIZE:
screen = pygame.display.set_mode(event.size, pygame.RESIZABLE)
pygame.display.update()

pygame error - the code is not working

This code is not working for me:
import pygame
pygame.init()
red = (255,0,0)
gamedisplay = pygame.display.set_mode((800,600))
pygame.display.set_caption("Snake")
gameExit = False
while not gameExit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameExit = True
gamedisplay.fill(red)
pygame.display.update
pygame.quit()
quit
It doesn't give me a red background.

You are not updating the screen. Fix this line:
pygame.display.update
to
pygame.display.update()

Pygame draw interactively

Hi I'm having some trouble realizing my ideas. I first wanted to draw rectangles with two mouse clicks, but it didn't work properly so i reduced it to this: to draw fixed-size rectangles with one mouse click.
However it still doesn't work/...
import pygame
windowSize = (500,500)
white = (255,255,255)
black = (0,0,0)
pygame.init()
screen = pygame.display.set_mode(windowSize)
running = 1
while running:
screen.fill(white)
pygame.display.update()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
running = 0
THE PROBLEM IS HERE SOMEWHERRE
elif event.type == pygame.MOUSEBUTTONDOWN:
rect = pygame.Rect(event.dict["pos"],(30,50))
pygame.draw.rect(screen,black,rect,1)
pygame.display.flip()
I know there might be a lot of conceptual errors with my code... please help!

You are filling white the entire screen every tick. So after you actually draw the screen become blank again on the next tick. Just move screen.fill(white) out of main cycle:
import pygame
windowSize = (500,500)
white = (255,255,255)
black = (0,0,0)
pygame.init()
screen = pygame.display.set_mode(windowSize)
running = 1
screen.fill(white)
while running:
pygame.display.update()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
elif event.type == pygame.MOUSEBUTTONDOWN:
rect = pygame.Rect(event.dict["pos"],(30,50))
pygame.draw.rect(screen,black,rect,1)
pygame.display.flip()