Pygame窗口打开后立即关闭

Question

import pygame
import time
import random

# pygame window initialisation
pygame.init()

# Declare the colors using their RBG colors
orangecolor = (253, 123, 7)
blackcolor = (0, 0, 0)
redcolor = (213, 50 , 80)
greencolor = (0, 255, 0)
bluecolor = (50, 153, 213)

# Display window's width and height
display_width = 1000
display_height = 1000
dis = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption("Snake Game")
snake_block = 10
snake_list =[]

# Defines the snake's structure and position
def snake(snake_block,snake_list):
    for x in snake_list:
        pygame.draw.rect(dis,greencolor,[x[0], x[1],snake_block, snake_block])

def snakegame():

    game_over = False
    game_end = False
    #coordinates of the snake
    x1 = display_width / 2
    y1 = display_height / 2
    #when snake moves
    x1_change = 0
    y1_change = 0

    #defines the length of the snake
    snake_list = []
    Length_of_snake = 1

    #the coordinates of the food element
    foodx = round(random.roundrange(0, display_width - snake_block) / 10)* 10
    foody = round(random.roundrange(0, display_height - snake_block) / 10)* 10

    while not game_over:
        while game_end == True:
            score = Length_of_snake - 1
            score_font = pygame.font.SysFont("comicsansms", 35)
            value = core_fnt.render("Your score: " + str(score), True, greenclor)
            dis.blit(value, [display_width / 3, display_height / 5])
            pygame.display.update()
            for event in pygame.even.get():
                if event.type == pygame.quit:
                    game_over = True
                    game_end = False

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_left:
                x1_change = -snake_block
                y1_change = 0
            elif event.key == pygame.K_right:
                x1_change = snake_block
                y1_change = 0
            elif event.key == pygame.K_up:
                y1_change = -snake_block 
                x1_change = 0
            elif event.key == pygame.K_down:
                y1_change = snake_block
                x1_change = 0
        if x1 >= display_width or x1 < 0 or y1 >= display_height or y1 <0:
           game_end = True

        #updated coordinates with te changed positions
        x1 += x1_change
        y1 += y1_change
        dis.fill(blackcolor)
        pygame.draw.rect(dis,bluecolor[foodx, foody, snake_block, snake_block])
        snake_Head = []
        snake_Head.append(x1)
        snake_Head.append(y1)
        snake_list.append(snake_Head)
        #when length of the snake exceeds,delete_snakelist will end the game
        if len(snake_list) > Length_of_snake:
            del snake_list[0]

        # when snake hits itself
        for x in snake_list[:-1]:
            if x == snake_Head:
                game_end =True

            snake(snake_block, snake_list)
            pygame.display.update()

            # when the snake hits the food it's length increases by 1
            if x1 == foodx and y1 == foody:
                foodx = round(random.roundrange(0, display_width - snake_block) / 10)* 10
                foody = round(random.roundrange(0, display_height - snake_block) / 10)* 10
            Length_of_snake += 1

        pygame.quit()
        quit()

我的pygame窗口立即关闭。有什么解决办法吗？我使用的是Visual Studio 2019社区版本。终端中没有显示错误，并且我也添加了循环，就像我在过去关于堆栈溢出的问题中所看到的那样。我什至重新输入了代码，但pygame窗口立即关闭。

Answer 1

该窗口正在关闭，因为您没有调用任何函数，并且脚本在打开窗口后结束。您需要调用函数snakegame()。

Answer 2

这是Indentation的问题。 quit必须在应用程序循环之后而不是在循环中调用，但是您必须绘制蛇形并更新应用程序循环中的显示。
还有更多您错过了致电snakegame()的情况，我建议通过pygame.time.Clock / tick()控制每秒的帧数：

def snakegame():

    clock = pygame.time.Clock()
    while not game_over:
        clock.tick(20)
        # [...]

        snake(snake_block, snake_list)
        pygame.display.update()

    #<--| INDENTATION
    pygame.quit()
    quit()

snakegame()

---

方法roundrange不存在。正确的名称是randrange：

foodx = round(random.randrange(0, display_width - snake_block) / 10)* 10
foody = round(random.randrange(0, display_height - snake_block) / 10)* 10

---

缺少,：

pygame.draw.rect(dis,bluecolor[foodx, foody, snake_block, snake_block])

pygame.draw.rect(dis, bluecolor, [foodx, foody, snake_block, snake_block])

---

Python区分大小写。键常量的名称为K_LEFT，K_RIGHT，K_UP和K_DOWN，而不是K_left，K_right，K_up和K_down。

---

完整示例：

import pygame
import time
import random

# pygame window initialisation
pygame.init()

#declare the colors using their RBG colors
orangecolor = (253, 123, 7)
blackcolor = (0, 0, 0)
redcolor = (213, 50 , 80)
greencolor = (0, 255, 0)
bluecolor = (50, 153, 213)

#Dislay window's width and height
display_width = 1000
display_height = 1000
dis = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption("Snake Game")
snake_block = 10
snake_list =[]

#Defines the snake's structure and position
def snake(snake_block,snake_list):
    for x in snake_list:
        pygame.draw.rect(dis,greencolor,[x[0], x[1],snake_block, snake_block])

def snakegame():

    game_over = False
    game_end = False
    #coordinates of the snake
    x1 = display_width / 2
    y1 = display_height / 2
    #when snake moves
    x1_change = 0
    y1_change = 0

    #defines the length of the snake
    snake_list = []
    Length_of_snake = 1

    #the coordinates of the food element
    foodx = round(random.randrange(0, display_width - snake_block) / 10)* 10
    foody = round(random.randrange(0, display_height - snake_block) / 10)* 10

    clock = pygame.time.Clock()
    while not game_over:
        clock.tick(20)
        while game_end == True:
            score = Length_of_snake - 1
            score_font = pygame.font.SysFont("comicsansms", 35)
            value = score_font.render("Your score: " + str(score), True, greencolor)
            dis.blit(value, [display_width / 3, display_heght / 5])
            pygame.display.update()
            for event in pygame.even.get():
                if event.type == pygame.quit:
                    game_over = True
                    game_end = False

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                x1_change = -snake_block
                y1_change = 0
            elif event.key == pygame.K_RIGHT:
                x1_change = snake_block
                y1_change = 0
            elif event.key == pygame.K_UP:
                y1_change = -snake_block 
                x1_change = 0
            elif event.key == pygame.K_DOWN:
                y1_change = snake_block
                x1_change = 0
        if x1 >= display_width or x1 < 0 or y1 >= display_height or y1 <0:
           game_end = True

        #updated coordinates with te changed positions
        x1 += x1_change
        y1 += y1_change
        dis.fill(blackcolor)
        pygame.draw.rect(dis,bluecolor, [foodx, foody, snake_block, snake_block])
        snake_Head = [x1, y1]
        snake_list.append(snake_Head)
        #when length of the snake exceeds,delete_snakelist will end the game
        if len(snake_list) > Length_of_snake:
            del snake_list[0]
        #when snake hits itself
        for x in snake_list[:-1]:
            if x == snake_Head:
                game_end =True
        #when the snake hits the food it's length increases by 1
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, display_width - snake_block) / 10)* 10
            foody = round(random.randrange(0, display_height - snake_block) / 10)* 10
            Length_of_snake += 1
        
        snake(snake_block, snake_list)
        pygame.display.update()

    pygame.quit()
    quit()

snakegame()