python python 贪吃蛇

以下是Python实现贪吃蛇小游戏的示例代码：

import pygame
import random

# 初始化pygame
pygame.init()

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

# 设置屏幕大小
SCREEN_WIDTH = 600
SCREEN_HEIGHT = 400
screen = pygame.display.set_mode([SCREEN_WIDTH, SCREEN_HEIGHT])

# 设置游戏标题
pygame.display.set_caption('贪吃蛇')

# 设置游戏时钟
clock = pygame.time.Clock()

# 定义蛇的初始位置和大小
BLOCK_SIZE = 10
snake_speed = 15

# 定义字体
font = pygame.font.SysFont(None, 25)

# 定义函数，用于在屏幕上显示文字
def message_to_screen(msg, color):
    screen_text = font.render(msg, True, color)
    screen.blit(screen_text, [SCREEN_WIDTH / 6, SCREEN_HEIGHT / 3])

# 定义函数，用于绘制蛇
def draw_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, BLACK, [x[0], x[1], snake_block, snake_block])

# 定义函数，用于显示游戏结束信息
def game_over():
    message_to_screen("Game over, press Q to quit or C to play again", RED)
    pygame.display.update()

# 定义函数，用于运行游戏
def gameLoop():
    game_exit = False
    game_over_flag = False

    # 初始化蛇的位置和长度
    lead_x = SCREEN_WIDTH / 2
    lead_y = SCREEN_HEIGHT / 2
    lead_x_change = 0
    lead_y_change = 0
    snake_List = []
    Length_of_snake = 1

    # 初始化食物的位置
    foodx = round(random.randrange(0, SCREEN_WIDTH - BLOCK_SIZE) / 10.0) * 10.0
    foody = round(random.randrange(0, SCREEN_HEIGHT - BLOCK_SIZE) / 10.0) * 10.0

    while not game_exit:

        while game_over_flag == True:
            game_over()
            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

        # 判断蛇是否撞到边界
        if lead_x >= SCREEN_WIDTH or lead_x < 0 or lead_y >= SCREEN_HEIGHT or lead_y < 0:
            game_over_flag = True

        # 更新蛇的位置
        lead_x += lead_x_change
        lead_y += lead_y_change

        # 绘制屏幕
        screen.fill(WHITE)
        pygame.draw.rect(screen, GREEN, [foodx, foody, BLOCK_SIZE, BLOCK_SIZE])
        snake_Head = []
        snake_Head.append(lead_x)
        snake_Head.append(lead_y)
        snake_List.append(snake_Head)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_over_flag = True

        draw_snake(BLOCK_SIZE, snake_List)
        pygame.display.update()

        # 判断蛇是否吃到食物
        if lead_x == foodx and lead_y == foody:
            foodx = round(random.randrange(0, SCREEN_WIDTH - BLOCK_SIZE) / 10.0) * 10.0
            foody = round(random.randrange(0, SCREEN_HEIGHT - BLOCK_SIZE) / 10.0) * 10.0
            Length_of_snake += 1

        # 设置游戏时钟
        clock.tick(snake_speed)

    # 退出pygame
    pygame.quit()

gameLoop()