Python写一个贪吃蛇游戏

好的，关于Python写贪吃蛇游戏的问题，我可以回答。下面是一个简单的Python代码示例：

import pygame
import random

# 初始化游戏
pygame.init()

# 定义游戏窗口大小
screen_width = 480
screen_height = 480

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)

# 创建游戏窗口
game_display = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption('Snake Game')

# 定义方块大小和蛇的大小
block_size = 10

# 定义字体
font = pygame.font.SysFont(None, 25)

# 定义游戏结束函数
def game_over():
    message('Game Over!', red)
    pygame.display.update()
    time.sleep(2)
    game_loop()

# 定义显示消息的函数
def message(msg, color):
    text = font.render(msg, True, color)
    game_display.blit(text, [screen_width/6, screen_height/3])

# 定义贪吃蛇函数
def snake(block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_display, black, [x[0], x[1], block_size, block_size])

# 定义游戏循环函数
def game_loop():
    game_exit = False
    game_over = False

    # 初始化蛇的位置和长度
    lead_x = screen_width / 2
    lead_y = screen_height / 2
    lead_x_change = 0
    lead_y_change = 0
    snake_list = []
    snake_length = 1

    # 初始化食物的位置
    food_x = round(random.randrange(0, screen_width - block_size) / 10.0) * 10.0
    food_y = round(random.randrange(0, screen_height - block_size) / 10.0) * 10.0

    while not game_exit:

        while game_over == True:
            game_display.fill(white)
            message("Press Q to Quit or C to Continue", red)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_exit = True
                        game_over = False
                    if event.key == pygame.K_c:
                        game_loop()

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_exit = True
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    lead_x_change = -block_size
                    lead_y_change = 0
                elif event.key == pygame.K_RIGHT:
                    lead_x_change = block_size
                    lead_y_change = 0
                elif event.key == pygame.K_UP:
                    lead_y_change = -block_size
                    lead_x_change = 0
                elif event.key == pygame.K_DOWN:
                    lead_y_change = block_size
                    lead_x_change = 0

        if lead_x >= screen_width or lead_x < 0 or lead_y >= screen_height or lead_y < 0:
            game_over()

        lead_x += lead_x_change
        lead_y += lead_y_change

        game_display.fill(white)
        pygame.draw.rect(game_display, red, [food_x, food_y