python pygame 蛇吃豆代码

Python Pygame是一个用于开发2D游戏的库，而蛇吃豆代码是一个经典的游戏示例。下面是一个简单的Python Pygame蛇吃豆代码示例：

import pygame
import random

# 初始化游戏
pygame.init()

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

# 设置屏幕尺寸
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Snake Game")

# 定义蛇的初始位置和大小
snake_block_size = 20
snake_speed = 15
x1 = screen_width / 2
y1 = screen_height / 2
x1_change = 0
y1_change = 0

# 定义豆子的初始位置和大小
food_block_size = 20
food_x = round(random.randrange(0, screen_width - food_block_size) / 20) * 20
food_y = round(random.randrange(0, screen_height - food_block_size) / 20) * 20

clock = pygame.time.Clock()

# 定义蛇的移动函数
def snake(snake_block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, GREEN, [x[0], x[1], snake_block_size, snake_block_size])

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

    # 蛇的初始长度
    snake_list = []
    length_of_snake = 1

    while not game_over:

        while game_close == True:
            screen.fill(BLACK)
            font_style = pygame.font.SysFont(None, 50)
            message = font_style.render("Game Over! Press Q-Quit or C-Play Again", True, RED)
            screen.blit(message, [screen_width / 6, screen_height / 3])
            pygame.display.update()

            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()

        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

        # 判断蛇是否撞到墙壁
        if x1 >= screen_width or x1 < 0 or y1 >= screen_height or y1 < 0:
            game_close = True

        # 更新蛇的位置
        x1 += x1_change
        y1 += y1_change
        screen.fill(BLACK)
        pygame.draw.rect(screen, WHITE, [food_x, food_y, food_block_size, food_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]

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

        snake(snake_block_size, snake_list)
        pygame.display.update()

        # 判断蛇是否吃到豆子，如果吃到，则长度加1，并重新生成豆子
        if x1 == food_x and y1 == food_y:
            food_x = round(random.randrange(0, screen_width - food_block_size) / 20) * 20
            food_y = round(random.randrange(0, screen_height - food_block_size) / 20) * 20
            length_of_snake += 1

        clock.tick(snake_speed)

    pygame.quit()
    quit()

# 启动游戏循环
game_loop()