用python实现贪吃蛇游戏

好的，下面是一个简单的贪吃蛇游戏的Python实现，希望能帮到你：

import pygame
import random
 
# 定义颜色
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
GREEN = (0, 255, 0)
RED = (255, 0, 0)
 
# 定义常量
WIDTH = 800
HEIGHT = 600
BLOCK_SIZE = 20
 
# 初始化 Pygame
pygame.init()
 
# 设置游戏窗口
size = (WIDTH, HEIGHT)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Snake Game")
 
# 设置时钟
clock = pygame.time.Clock()
 
# 定义字体
font = pygame.font.SysFont(None, 25)
 
# 定义函数，用于显示文字
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    screen.blit(screen_text, [WIDTH / 2, HEIGHT / 2])
 
# 定义函数，用于绘制贪吃蛇
def draw_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, GREEN, [x[0], x[1], snake_block, snake_block])
 
# 定义函数，用于显示得分
def show_score(score):
    score_text = font.render("Score: " + str(score), True, WHITE)
    screen.blit(score_text, [0, 0])
 
# 定义函数，用于显示游戏结束信息
def game_over():
    message_to_screen("Game over! Press Q-Quit or C-Play Again", RED)
 
# 定义函数，用于运行贪吃蛇游戏
def gameLoop():
    game_exit = False
    game_over_flag = False
 
    # 初始贪吃蛇的位置和长度
    lead_x = WIDTH / 2
    lead_y = HEIGHT / 2
    lead_x_change = 0
    lead_y_change = 0
    snake_list = []
    snake_length = 1
 
    # 初始食物的位置
    food_x = round(random.randrange(0, WIDTH - BLOCK_SIZE) / 20.0) * 20.0
    food_y = round(random.randrange(0, HEIGHT - BLOCK_SIZE) / 20.0) * 20.0
 
    while not game_exit:
        while game_over_flag == True:
            game_over()
            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_flag = False
                    if event.key == pygame.K_c:
                        gameLoop()
 
        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
 
        # 判断贪吃蛇是否撞墙
        if lead_x >= WIDTH or lead_x < 0 or lead_y >= HEIGHT or lead_y < 0:
            game_over_flag = True
 
        lead_x += lead_x_change
        lead_y += lead_y_change
 
        screen.fill(BLACK)
 
        # 绘制食物
        pygame.draw.rect(screen, RED, [food_x, food_y, BLOCK_SIZE, BLOCK_SIZE])
 
        # 将贪吃蛇的头部坐标加入到贪吃蛇列表中
        snake_head = []
        snake_head.append(lead_x)
        snake_head.append(lead_y)
        snake_list.append(snake_head)
 
        # 如果贪吃蛇的长度超过了设定的长度，就删除贪吃蛇列表中的第一个坐标
        if len(snake_list) > snake_length:
            del snake_list[0]
 
        # 判断贪吃蛇是否吃到了食物，如果吃到了，则长度加一，重新生成食物
        for block in snake_list[:-1]:
            if block == snake_head:
                game_over_flag = True
 
        draw_snake(BLOCK_SIZE, snake_list)
        show_score(snake_length - 1)
 
        pygame.display.update()
 
        if lead_x == food_x and lead_y == food_y:
            food_x = round(random.randrange(0, WIDTH - BLOCK_SIZE) / 20.0) * 20.0
            food_y = round(random.randrange(0, HEIGHT - BLOCK_SIZE) / 20.0) * 20.0
            snake_length += 1
 
        clock.tick(10)
 
    pygame.quit()
    quit()
 
gameLoop()

这是一个比较简单的贪吃蛇游戏实现，你可以根据自己的需要进行修改和扩展。