用python制作一个贪吃蛇的程序

下面是一个使用Python编写的简单贪吃蛇程序示例：

import pygame
import time
import random

# 初始化pygame
pygame.init()

# 定义颜色
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)

# 窗口大小
window_width = 800
window_height = 600

# 定义蛇的大小和速度
snake_size = 10
snake_speed = 15

# 设置窗口大小
game_display = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption('贪吃蛇')

# 定义时钟
clock = pygame.time.Clock()

# 字体设置
font_style = pygame.font.SysFont(None, 50)
score_font = pygame.font.SysFont(None, 35)


# 显示得分
def show_score(score):
    value = score_font.render("得分: " + str(score), True, BLACK)
    game_display.blit(value, [10, 10])


# 绘制蛇
def draw_snake(snake_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(game_display, GREEN, [x[0], x[1], snake_size, snake_size])


# 游戏结束时显示信息
def message(msg, color):
    mesg = font_style.render(msg, True, color)
    game_display.blit(mesg, [window_width / 6, window_height / 3])


# 游戏循环
def game_loop():
    game_over = False
    game_close = False

    # 蛇的初始位置
    x1 = window_width / 2
    y1 = window_height / 2

    # 蛇在x和y轴上移动的初始速度
    x1_change = 0
    y1_change = 0

    # 初始化蛇的长度
    snake_list = []
    length_of_snake = 1

    # 随机生成食物的位置
    foodx = round(random.randrange(0, window_width - snake_size) / 10.0) * 10.0
    foody = round(random.randrange(0, window_height - snake_size) / 10.0) * 10.0

    while not game_over:

        while game_close:
            game_display.fill(WHITE)
            message("游戏结束! 按 Q-退出, C-重新开始", RED)
            show_score(length_of_snake - 1)
            pygame.display.update()

            # 处理游戏结束时的事件
            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        game_loop()

        # 处理游戏中的事件
        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:
                    x1_change = -snake_size
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_size
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_size
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_size
                    x1_change = 0

        # 判断蛇是否超出窗口边界
        if x1 >= window_width or x1 < 0 or y1 >= window_height or y1 < 0:
            game_close = True

        x1 += x1_change
        y1 += y1_change
        game_display.fill(WHITE)
        pygame.draw.rect(game_display, BLUE, [foodx, foody, snake_size, snake_size])
        snake_head = []
        snake_head.append(x1)
        snake_head.append(y1)
        snake_list.append(snake_head)

        # 控制蛇的长度
        if len(snake_list) > length_of_snake:
            del snake_list[0]

        # 判断蛇是否碰到自身
        for x in snake_list[:-1]:
            if x == snake_head:
                game_close = True

        draw_snake(snake_size, snake_list)
        show_score(length_of_snake - 1)

        pygame.display.update()

        # 判断蛇是否吃到食物
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, window_width - snake_size) / 10.0) * 10.0
            foody = round(random.randrange(0, window_height - snake_size) / 10.0) * 10.0
            length_of_snake += 1

        # 控制蛇的速度
        clock.tick(snake_speed)

    pygame.quit()


# 运行游戏循环
game_loop()

运行这个程序，将在一个窗口中显示贪吃蛇游戏。你可以使用方向键来控制蛇的移动方向，吃到食物后蛇的长度会增加，如果蛇碰到窗口边界或自身，则游戏结束。游戏结束后，你可以按下 Q 键退出游戏，按下 C 键重新开始游戏