Why is it not printing out

[dedesssse]

Im trying to make an own "collision" which you can first see in "world_Data" in the class world.coll. But the world data is not updating it and all the "1" is dirt and 0 nothing

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class World():     def __init__(self,world_data):           self.tile_list = []           dirt = pygame.image.load(os.path.join('pics', 'hej.png'))         row_count = 0         for row in world_data:             col_count = 0             for tile in row:                 if tile == 1:                     img = pygame.transform.scale(dirt, (tile_size, tile_size))                     img_rect = img.get_rect()                     img_rect.x = col_count * tile_size                     img_rect.y = row_count * tile_size                     tile = (img, img_rect)                     self.tile_list.append(tile)                   col_count += 1             row_count += 1         def draw(self):         for tile in self.tile_list:             WIN.blit(tile[0], tile[1])       def coll(self,erik_move):         if erik_move[1] > 500:             world_data[0] = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0]     world_data = [         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],         [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],         [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],     ]       world = World(world_data)         def draw_grid():     for line in range(0, 20):         pygame.draw.line(WIN, (255, 255, 255), (0, line * tile_size), (WIDTH, line * tile_size))         pygame.draw.line(WIN, (255, 255, 255), (line * tile_size, 0), (line * tile_size, HEIGHT))       font = pygame.font.SysFont("Times New Roman, Arial", 30) text = font.render("BONK A BEAVER", True, BLACK)     ERIK = pygame.image.load(os.path.join('pics', 'erik2.png')) ERIK = pygame.transform.scale(ERIK, (200, 200))   Backg = pygame.image.load(os.path.join('pics', 'sky.png'))   print(Backg) FPS = 60       #Om du vill röra din surface, (bilden/surface, hastighet per frames  )     def key_pressed(keys_pressed, erik_move):     if keys_pressed[pygame.K_a]:         erik_move.x -= 5     if keys_pressed[pygame.K_d]:         erik_move.x += 5     if keys_pressed[pygame.K_w]:         erik_move.y -= 5     if keys_pressed[pygame.K_s]:         erik_move.y += 5           def erik_pos(erik_move, number):     erik_move[0] = erik_move[0] + number             #Här bildas och uppdateras surface def draw_window(erik_move):     WIN.fill(BLACK)     WIN.blit(ERIK, (erik_move.x, erik_move.y))       world.draw()     draw_grid()       world.coll(erik_move)     print(world_data[0])     pygame.display.update()