使用python写一个贪吃蛇小游戏

好的，下面是一个简单的贪吃蛇小游戏的代码，使用Python语言编写：

import pygame
import random

pygame.init()

# 游戏区域大小
width = 500
height = 500

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

# 创建游戏窗口
game_display = pygame.display.set_mode((width, height))
pygame.display.set_caption("贪吃蛇小游戏")

# 设置帧率
clock = pygame.time.Clock()

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

# 定义字体
font_style = pygame.font.SysFont(None, 30)

# 显示得分
def show_score(score):
    score_text = font_style.render("得分：" + str(score), True, white)
    game_display.blit(score_text, [0, 0])

# 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])

# 显示消息
def message(msg, color):
    message_text = font_style.render(msg, True, color)
    game_display.blit(message_text, [width / 6, height / 3])

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

    # 初始坐标
    x1 = width / 2
    y1 = height / 2

    # 坐标变化量
    x1_change = 0
    y1_change = 0

    # 初始化蛇的列表
    snake_list = []
    length_of_snake = 1

    # 定义食物的初始坐标
    foodx = round(random.randrange(0, width - snake_size) / 10.0) * 10.0
    foody = round(random.randrange(0, height - snake_size) / 10.0) * 10.0

    while not game_exit:

        while game_over == True:
            game_display.fill(black)
            message("游戏结束！按Q退出，按C重新开始", red)
            show_score(length_of_snake - 1)
            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 = False
                    elif event.key == pygame.K_c:
                        game_loop()

        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:
                    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

        # 判断是否出界
        if x1 >= width or x1 < 0 or y1 >= height or y1 < 0:
            game_over = True

        # 更新坐标
        x1 += x1_change
        y1 += y1_change

        game_display.fill(black)

        # 绘制食物
        pygame.draw.rect(game_display, red, [foodx, foody, snake_size, snake_size])

        # 更新蛇的位置
        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]

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

        # 绘制蛇
        draw_snake(snake_size, snake_list)

        # 显示得分
        show_score(length_of_snake - 1)

        # 更新游戏
        pygame.display.update()

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

        # 设置帧率
        clock.tick(snake_speed)

    pygame.quit()
    quit()

game_loop()

你可以将以上代码复制到Python环境中运行，就可以开始游戏了！