用python写一段贪吃蛇游戏的代码

好的，以下是Python实现的简单贪吃蛇游戏代码：

import pygame
import time
import random
 
# 初始化pygame
pygame.init()
 
# 设置游戏窗口大小
width = 600
height = 400
game_display = pygame.display.set_mode((width, height))
pygame.display.set_caption('贪吃蛇游戏')
 
# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (200, 0, 0)
light_red = (255, 0, 0)
yellow = (200, 200, 0)
light_yellow = (255, 255, 0)
 
# 设置时钟
clock = pygame.time.Clock()
 
# 定义蛇的大小
snake_size = 10
 
# 设置字体
font = pygame.font.SysFont(None, 25)
 
# 定义text函数，支持在游戏窗口上输出文字
def text_objects(text, color):
    text_surface = font.render(text, True, color)
    return text_surface, text_surface.get_rect()
 
# 输出消息
def message(msg, color):
    text_surf, text_rect = text_objects(msg, color)
    text_rect.center = (width/2, height/2)
    game_display.blit(text_surf, text_rect)
    pygame.display.update()
 
# 定义贪吃蛇函数
def snake(snake_size, snake_list):
    for rect in snake_list:
        pygame.draw.rect(game_display, yellow, [rect[0], rect[1], snake_size, snake_size])
 
# 定义主程序
def game_loop():
    game_exit = False
    game_over = False
    x = width/2
    y = height/2
    x_change = 0
    y_change = 0
    snake_list = []
    snake_length = 1
    food_x = round(random.randrange(0, width - snake_size) / 10.0) * 10.0
    food_y = round(random.randrange(0, height - snake_size) / 10.0) * 10.0
 
    # 游戏循环
    while not game_exit:
        while game_over == True:
            game_display.fill(white)
            message("游戏结束，按 C 重玩，按 Q 退出游戏", red)
            pygame.display.update()
 
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_c:
                        game_loop()
                    elif event.key == pygame.K_q:
                        game_exit = True
                        game_over = False
 
        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:
                    x_change = -snake_size
                    y_change = 0
                elif event.key == pygame.K_RIGHT:
                    x_change = snake_size
                    y_change = 0
                elif event.key == pygame.K_UP:
                    y_change = -snake_size
                    x_change = 0
                elif event.key == pygame.K_DOWN:
                    y_change = snake_size
                    x_change = 0
 
        # 边界判断
        if x >= width or x < 0 or y >= height or y < 0:
            game_over = True
 
        # 改变移动方向
        x += x_change
        y += y_change
 
        # 填充白色背景
        game_display.fill(white)
 
        # 绘制食物
        pygame.draw.rect(game_display, red, [food_x, food_y, snake_size, snake_size])
 
        # 循环绘制贪吃蛇
        snake_head = []
        snake_head.append(x)
        snake_head.append(y)
        snake_list.append(snake_head)
 
        if len(snake_list) > snake_length:
            del snake_list[0]
 
        for rect in snake_list[:-1]:
            if rect == snake_head:
                game_over = True
 
        snake(snake_size, snake_list)
 
        pygame.display.update()
 
        if x == food_x and y == food_y:
            food_x = round(random.randrange(0, width - snake_size) / 10.0) * 10.0
            food_y = round(random.randrange(0, height - snake_size) / 10.0) * 10.0
            snake_length += 1
 
        # 设置帧率
        clock.tick(20)
 
    # 关闭pygame
    pygame.quit()
    quit()
 
game_loop()

希望能够满足你的需求。