用Python实现贪吃蛇游戏

以下是用Python实现贪吃蛇游戏的一个简单示例：

import pygame
import time

# 初始化游戏
pygame.init()

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

# 设置游戏窗口的宽度和高度
window_width = 800
window_height = 600
# 创建游戏窗口
game_window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption('贪吃蛇游戏')

# 设置游戏速度
clock = pygame.time.Clock()
snake_block_size = 20
snake_speed = 15

# 定义字体
font_style = pygame.font.SysFont(None, 50)
score_font = pygame.font.SysFont(None, 35)

# 定义显示分数的函数
def show_score(score):
    score_text = score_font.render("Score: " + str(score), True, black)
    game_window.blit(score_text, [10, 10])

# 定义绘制蛇的函数
def draw_snake(snake_block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_window, black, [x[0], x[1], snake_block_size, snake_block_size])

# 定义游戏主循环
def game_loop():
    game_over = False
    game_close = False

    # 初始化蛇的位置和长度
    x1 = window_width / 2
    y1 = window_height / 2
    x1_change = 0
    y1_change = 0
    snake_list = []
    length_of_snake = 1

    # 随机生成食物的位置
    foodx = round((window_width / 2) / 10.0) * 10.0
    foody = round((window_height / 2) / 10.0) * 10.0

    while not game_over:

        while game_close == True:
            game_window.fill(white)
            game_over_text = font_style.render("Game Over", True, red)
            game_window.blit(game_over_text, [window_width / 2 - 100, window_height / 2 - 50])
            show_score(length_of_snake - 1)
            pygame.display.update()

            # 游戏结束后，按下空格键重新开始游戏，按下q键退出游戏
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_SPACE:
                        game_loop()
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False

        # 控制蛇的移动
        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_size
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block_size
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block_size
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block_size
                    x1_change = 0

        # 判断蛇是否撞墙
        if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0:
            game_close = True

        # 更新蛇的位置
        x1 += x1_change
        y1 += y1_change
        game_window.fill(white)
        pygame.draw.rect(game_window, red, [foodx, foody, snake_block_size, snake_block_size])
        snake_head = []
        snake_head.append(x1)
        snake_head.append(y1)
        snake_list.append(snake_head)
        if len(snake_list) > length_of_snake:
            del snake_list[0]

        # 判断蛇是否吃到食物
        for x in snake_list[:-1]:
            if x == snake_head:
                game_close = True

        # 绘制蛇和食物
        draw_snake(snake_block_size, snake_list)
        show_score(length_of_snake - 1)
        pygame.display.update()

        # 判断蛇是否吃到食物，如果吃到则生成新的食物
        if x1 == foodx and y1 == foody:
            foodx = round((window_width / 2) / 10.0) * 10.0
            foody = round((window_height / 2) / 10.0) * 10.0
            length_of_snake += 1

        # 控制游戏速度
        clock.tick(snake_speed)

    pygame.quit()

# 开始游戏
game_loop()