python语言写一个贪吃蛇游戏

好的，以下是一个简单的贪吃蛇游戏的 Python 代码：

import pygame
import random
 
# 初始化 pygame
pygame.init()
 
# 游戏窗口大小
WINDOW_WIDTH = 500
WINDOW_HEIGHT = 500
 
# 颜色定义
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)
 
# 创建游戏窗口
window = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))
pygame.display.set_caption("贪吃蛇")
 
# 设置游戏时钟
clock = pygame.time.Clock()
 
# 贪吃蛇方块大小
BLOCK_SIZE = 10
 
# 字体对象
font = pygame.font.SysFont(None, 25)
 
# 绘制文字的函数
def draw_text(text, color, x, y):
    text_obj = font.render(text, True, color)
    window.blit(text_obj, (x, y))
 
# 绘制贪吃蛇的函数
def draw_snake(snake_list):
    for snake in snake_list:
        pygame.draw.rect(window, GREEN, [snake[0], snake[1], BLOCK_SIZE, BLOCK_SIZE])
 
# 游戏主循环
def game_loop():
    # 初始化贪吃蛇位置
    snake_x = 250
    snake_y = 250
 
    # 初始化贪吃蛇移动方向
    snake_x_change = 0
    snake_y_change = 0
 
    # 初始化食物位置
    food_x = round(random.randrange(0, WINDOW_WIDTH - BLOCK_SIZE) / 10.0) * 10.0
    food_y = round(random.randrange(0, WINDOW_HEIGHT - BLOCK_SIZE) / 10.0) * 10.0
 
    # 初始化贪吃蛇长度列表
    snake_list = []
    snake_length = 1
 
    # 游戏结束标志
    game_over = False
 
    while not game_over:
        # 处理事件
        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:
                    snake_x_change = -BLOCK_SIZE
                    snake_y_change = 0
                elif event.key == pygame.K_RIGHT:
                    snake_x_change = BLOCK_SIZE
                    snake_y_change = 0
                elif event.key == pygame.K_UP:
                    snake_y_change = -BLOCK_SIZE
                    snake_x_change = 0
                elif event.key == pygame.K_DOWN:
                    snake_y_change = BLOCK_SIZE
                    snake_x_change = 0
 
        # 移动贪吃蛇
        snake_x += snake_x_change
        snake_y += snake_y_change
 
        # 判断贪吃蛇是否吃到食物
        if snake_x == food_x and snake_y == food_y:
            food_x = round(random.randrange(0, WINDOW_WIDTH - BLOCK_SIZE) / 10.0) * 10.0
            food_y = round(random.randrange(0, WINDOW_HEIGHT - BLOCK_SIZE) / 10.0) * 10.0
            snake_length += 1
 
        # 判断贪吃蛇是否撞墙或撞到自己
        if snake_x >= WINDOW_WIDTH or snake_x < 0 or snake_y >= WINDOW_HEIGHT or snake_y < 0:
            game_over = True
        head = []
        head.append(snake_x)
        head.append(snake_y)
        snake_list.append(head)
        if len(snake_list) > snake_length:
            del snake_list[0]
        for segment in snake_list[:-1]:
            if segment == head:
                game_over = True
 
        # 绘制游戏窗口
        window.fill(WHITE)
        draw_text("贪吃蛇长度: " + str(snake_length - 1), BLACK, 10, 10)
        pygame.draw.rect(window, RED, [food_x, food_y, BLOCK_SIZE, BLOCK_SIZE])
        draw_snake(snake_list)
        pygame.display.update()
 
        # 设置游戏帧率
        clock.tick(20)
 
    # 退出 pygame
    pygame.quit()
 
# 运行游戏
game_loop()

这个游戏使用了 Pygame 库，需要先安装 Pygame 库才能运行。游戏规则是控制贪吃蛇吃到食物，贪吃蛇长度每吃到一次食物就加1，遇到墙壁或者自己的身体就会游戏结束。