I am building a game but I can't move left. Help.

Question

I am building a game using python with pygame. I spent a lot of time looking through the code but can't find the error. when I run the code the block moves right but not left!!! Can someone please tell me what I did wrong?

Here is the code:

import pygame
import sys

pygame.init()

WIDTH = 800
HEIGHT = 600

RED = (255, 0, 0)
player_pos = [400, 300]
player_size = 50

screen = pygame.display.set_mode((WIDTH, HEIGHT))

game_over = False

while not game_over:

for event in pygame.event.get():

if event.type == pygame.QUIT:
sys.exit()

if event.type == pygame.KEYDOWN:
x = player_pos[0]
y = player_pos[1]

if event.key == pygame.K_LEFT:
x -= player_size

elif event.key == pygame.K_RIGHT:
x += player_size

player_pos = [x,y]

screen.fill((0,0,0))
pygame.draw.rect(screen, RED, (player_pos[0], player_pos[1], player_size, player_size))

pygame.display. update()

Answer 1

Monisha ,

could you please provide the originally code in playground and link it here. thanks

Answer 2

Monisha , there may be a misunderstanding, so please take your code that causes the error, put it in playground and link it here. use copy paste, do not retype it. thanks!

Answer 3

I do not experience in pygame but I see in your last two if statements you change the size and not position. Better should be:
if event.key == pygame.K_LEFT:
x -= player_pos
etc.

Answer 4

The web searching can be helpful too. For more information please see i.e. here:

https://www.techwithtim.net/tutorials/game-development-with-JUMP_LINK__&&__python__&&__JUMP_LINK/pygame-tutorial/pygame-tutorial-movement/

Answer 5

Lothar Jan Markus please help Monisha

Answer 6

Ok i see, that all should be only if statements such as follows.

if keys[pygame.K_LEFT]:
x -= vel
if keys[pygame.K_RIGHT]:
x += vel
if keys[pygame.K_UP]:
y -= vel
if keys[pygame.K_DOWN]:
y += vel

Answer 7

Monisha
please provide your code in playground and link it here in this way as I my code. Otherwise a really help is imposible.

https://code.sololearn.com/c48by8KMm4E4/?ref=app

Answer 8

I tried that, but it just shows an error

Answer 9

I still can't figure it out. when I put a # in front of the elif statement the left key movement works but when I take the # of the left part it won't work but the right one does. IDK what to do

Answer 10

I am sorry, I forgot to inform you. I have solved the error. I had hit an extra tab by accident. Thanks for the help though :)

Answer 11

I am not sure how but I was following a tutorial. here is the link: https://youtu.be/-8n91btt5d8