"模块"对象没有属性"game_display"

Question

错误：

Traceback (most recent call last):
      File "/home/hayden/Desktop/Platformer/platformer.py", line 65, in <module>
        game_loop()
      File "/home/hayden/Desktop/Platformer/platformer.py", line 58, in game_loop
        char(char_x,char_y)
      File "/home/hayden/Desktop/Platformer/platformer.py", line 23, in char
        pygame.game_display.blit(size,(x,y))
    AttributeError: 'module' object has no attribute 'game_display'
    >>> 

法典：

import pygame
pygame.init()
display_width = 800
display_height = 600
char_width = 128
char_height = 99
char_sprite = pygame.image.load("man.png")
framerate = 30
gravity = 5
game_display = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("Platformer")
clock = pygame.time.Clock()
def char(x,y):
    size = pygame.transform.scale(char_sprite,(128,99))
    pygame.game_display.blit(size,(x,y))
def close():
    pygame.quit()
    quit()
def game_loop():
    char_x = display_width/2
    char_y = display_height/2
    char_x_change = 0
    char_y_change = 0
    char_speed = 5
    game_exit = False
    while not game_exit:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                close()
            if event.type == pygame.KEYDOWN:
                if event.type == pygame.K_W:
                    char_y_change -= char_speed
                if event.type == pygame.K_S:
                    char_y_change += char_speed
                if event.type == pygame.K_A:
                    char_x_change -= char_speed
                if event.type == pygame.K_D:
                    char_x_change += char_speed
        game_display.fill((0,0,255))
        char_x += char_x_change
        char_y += char_y_change
        char_y -= gravity
        char(char_x,char_y)
        char_y -= gravity
        pygame.display.update()
        clock.tick(framerate)
game_loop()

我不知道为什么我会收到此错误和黑屏。为了帮助您更好地理解代码，我正在尝试创建一个 2d 平台成型器。我是编程和pygame的新手，所以请尽量不要给出高级解释。对于像这样的其他错误，似乎您必须导入某些内容，但导入了pygame。

Answer 1

这是修改后的代码。还有更多的错误，但你必须尝试自己解决，只有在你不能独自完成时才问。:)当你调用一个函数时，你必须将值和参数发送到它。函数不会自动执行此操作。查看我所做的更改。

import pygame
from pygame import *
pygame.init()
display_width = 800
display_height = 600
char_width = 128
char_height = 99
char_sprite = pygame.image.load("test.png")
framerate = 30
gravity = 5
screen = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("Platformer")
clock = pygame.time.Clock()
def char(x,y, screen):
    size = pygame.transform.scale(char_sprite,(128,99))
    screen.blit(size,(x,y))
def close():
    pygame.quit()
    quit()
def game_loop(screen, display_width, display_height):
    char_x = display_width/2
    char_y = display_height/2
    char_x_change = 0
    char_y_change = 0
    char_speed = 5
    game_exit = False
    while not game_exit:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                close()
            if event.type == pygame.KEYDOWN:
                if event.type == pygame.K_W:
                    char_y_change -= char_speed
                if event.type == pygame.K_S:
                    char_y_change += char_speed
                if event.type == pygame.K_A:
                    char_x_change -= char_speed
                if event.type == pygame.K_D:
                    char_x_change += char_speed
        screen.fill((0,0,255))
        char_x += char_x_change
        char_y += char_y_change
        char_y -= gravity
        char(char_x,char_y, screen)
        char_y -= gravity
        pygame.display.update()
        clock.tick(framerate)
game_loop(screen, display_width, display_height)

希望这有帮助。