PyGame not drawing rectangle

Question

pygame not working pygame is not drawing any rectangles or any other shapes all I see is a white and blank screen, and for people wondering yeah I have pygame installed

I am new to oop programming. first) main.py second) setting.py

from setting import *
import pygame


class Game:
    def __init__(self):
        pass
    def game(self):
        pygame.init()
        screen = pygame.display.set_mode((WIDTH, HEIGHT))
        pygame.display.set_caption(TITLE)
        clock = pygame.time.Clock()
        running = True
        x=0
        y=0
        for row in MAP:
                print(row)
                for pos in row:
                    print(pos)
                    if pos == "x":    
                        pygame.draw.rect(screen, [0, 0, 255], [x, y, 20, 20], 1)
                        x+=20
        while running:
            clock.tick(FPS)
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    running = False
            
            screen.fill(COLOR)
            pygame.display.flip()
        pygame.quit()
        quit()


game = Game()
game.game()

second) setting.py

FPS = 60
WIDTH = 800
HEIGHT = 600
COLOR = [255,255,255]
TITLE = 'test'


MAP = [['x', 'x', 'x','x','x', 'x', 'x','x','x', 'x', 'x','x']
      ,['x', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'x']
      ,['x', ' ', ' ', 'P', ' ', ' ', ' ', ' ', ' ', ' ', 'x']
      ,['x', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'x']
      ,['x', 'x', 'x','x','x', 'x', 'x','x','x', 'x', 'x','x']
]

Answer 1

You need to redraw the scene in each frame. The typical PyGame application loop has to:

• limit the frames per second to limit CPU usage with pygame.time.Clock.tick
• handle the events by calling either pygame.event.pump() or pygame.event.get().
• update the game states and positions of objects dependent on the input events and time (respectively frames)
• clear the entire display or draw the background
• draw the entire scene (blit all the objects)
• update the display by calling either pygame.display.update() or pygame.display.flip()

from setting import *
import pygame

class Game:
    def __init__(self):
        pass
    def game(self):
        pygame.init()
        screen = pygame.display.set_mode((WIDTH, HEIGHT))
        pygame.display.set_caption(TITLE)
        clock = pygame.time.Clock()
        running = True

        while running:
            # limit the frames per second
            clock.tick(FPS)

            # handle the events
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    running = False
            
            # clear the display
            screen.fill(COLOR)

            # draw all objects in the scene
            for y, row in enumerate(MAP):
                for x, pos in enumerate(row):
                    if pos == "x":    
                        pygame.draw.rect(screen, [0, 0, 255], [x*20, y*20, 20, 20], 1)

            # update the display
            pygame.display.flip()

        pygame.quit()
        quit()

game = Game()
game.game()

The definition of the map can be simplified:

MAP = [
    'xxxxxxxxxxxx',
    'x          x',
    'x  p       x',
    'x          x',
    'xxxxxxxxxxxx'
]