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+--- Thread: [PyGame] Pygame is treating blob_group as a surface, when I need it to treat it as a Sprite. (/thread-39277.html)
Pygame is treating blob_group as a surface, when I need it to treat it as a Sprite. - Swagford - Jan-24-2023
Hey all, I'm following along a pygame tutorial for a platforming game and have been stuck on this for a while now. I made sure to do exactly as the tutorial said and went over it many times. For some reason, my pygame keeps treating blob_group as a Surface object. I'm not sure why now, I have tried making blob_group a global, have checked for NameErrors, and tried moving around some lines of code. I've left below the error that I get returned to me, and the code that I have written so far.
import pygame
from pygame.locals import *
pygame.init()
screen_width = 400
screen_height = 400
tile_size = 20
clock = pygame.time.Clock()
fps = 60
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption('Platformer')
#load images
bg_img = pygame.image.load("C:\img/sky.png")
blob_group = pygame.image.load("C:\img/blob.png")
class Player():
def __init__(self, x, y):
self.images_right = []
self.images_left = []
self.index = 0
self.counter = 0
for num in range(1, 3):
img_right = pygame.image.load(f'C:\img/Man{num}.png')
img_right = pygame.transform.scale(img_right, (20, 40))
img_left = pygame.transform.flip(img_right, True, False)
self.images_right.append(img_right)
self.images_left.append(img_left)
self.image = self.images_right[self.index]
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
self.width = self.image.get_width()
self.height = self.image.get_height()
self.vel_y = 0
self.jumped = False
self.direction = 0
def update(self):
dx = 0
dy = 0
walk_cooldown = 20
#get keypresses
key = pygame.key.get_pressed()
if key[K_LEFT]:
dx -= 2
self.counter += 1
self.direction = -1
if key[K_SPACE] and self.jumped == False:
self.vel_y = -15
self.jumped = True
if key[K_SPACE] == False:
self.jumped = False
if key[K_RIGHT]:
dx += 2
self.counter += 1
self.direction = 1
if key[K_LEFT] == False and key[K_RIGHT] == False:
self.counter = 0
self.index = 0
if self.direction == 1:
self.image = self.images_right[self.index]
if self.direction == -1:
self.image = self.images_left[self.index]
#handle animation
if self.counter > walk_cooldown:
self.counter = 0
self.index += 1
if self.index >= len(self.images_right):
self.index = 0
if self.direction == 1:
self.image = self.images_right[self.index]
if self.direction == -1:
self.image = self.images_left[self.index]
#add gravity
self.vel_y += 1
if self.vel_y > 10:
self.vel_y = 10
dy += self.vel_y
#check for collision
for tile in world.tile_list:
#check for collision in x direction
if tile[1].colliderect(self.rect.x + dx, self.rect.y, self.width, self.height):
dx = 0
#check for collision in y direction
if tile[1].colliderect(self.rect.x, self.rect.y + dy, self.width, self.height):
#check if below the ground i.e. jumping
if self.vel_y < 0:
dy = tile[1].bottom - self.rect.top
self.vel_y = 0
#check if above the ground i.e. falling
elif self.vel_y >= 0:
dy = tile[1].top - self.rect.bottom
self.vel_y = 0
#update player coordinates
self.rect.x += dx
self.rect.y += dy
if self.rect.bottom > screen_height:
self.rect.bottom = screen_height
dy = 0
#draw player onto screen
screen.blit(self.image, self.rect)
pygame.draw.rect(screen, (255, 255, 255), self.rect, 1)
class World():
def __init__ (self, data):
self.tile_list = []
#load images
dirt_img = pygame.image.load("C:\img/dirt.png")
grass_img = pygame.image.load("C:\img/grass.png")
row_count = 0
for row in data:
col_count = 0
for tile in row:
if tile == 1:
img = pygame.transform.scale(dirt_img, (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)
if tile == 2:
img = pygame.transform.scale(grass_img, (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)
if tile == 3:
blob = Enemy(col_count * tile_size, row_count * tile_size + 15)
blob_group.add(blob)
col_count += 1
row_count += 1
def draw(self):
for tile in self.tile_list:
screen.blit(tile[0], tile[1])
pygame.draw.rect(screen, (255, 255, 255), tile[1], 1)
class Enemy(pygame.sprite.Sprite):
def __init__(self, x, y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("C:\img/blob.png")
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
world_data = [
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 2, 0, 2, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 1, 2, 1],
[1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1],
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
]
player = Player(20, screen_height -40)
world = World(world_data)
blob_group = pygame.sprite.Group()
run = True
while run:
clock.tick(fps)
screen.blit(bg_img, (0, 0))
world.draw()
blob_group.update()
blob_group.draw(screen)
player.update()
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
pygame.display.update()
pygame.quitThe code above will produce the following feedback error:Error:line 145, in __init__
blob_group.add(blob)
AttributeError: 'pygame.Surface' object has no attribute 'add'RE: Pygame is treating blob_group as a surface, when I need it to treat it as a Sprite. - metulburr - Jan-24-2023
Line 18 you assign it to a loaded pygame image, which is a surface. Then you define your World class, and then call the world class. But right after that one line 187 you redefine it to a group. You should have this defined before World class definition.
You shouldn't use the same variable and change it mid program to some other object.