Python 贪吃蛇游戏代码：简单易懂的实现

以下是一个简单的 Python 贪吃蛇游戏代码：

import pygame
import random

# 初始化Pygame
pygame.init()

# 游戏屏幕尺寸
screen_width = 480
screen_height = 480

# 创建游戏屏幕
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption('贪吃蛇游戏')

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

# 定义贪吃蛇初始位置和大小
snake_block_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)
    screen.blit(score_text, [0, 0])

# 绘制贪吃蛇
def draw_snake(snake_block_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, black, [x[0], x[1], snake_block_size, snake_block_size])

# 游戏结束
def game_over():
    game_over_text = font_style.render('游戏结束！', True, white)
    screen.blit(game_over_text, [screen_width/6, screen_height/3])

# 主函数
def gameLoop():
    game_exit = False
    game_over_flag = False

    # 初始位置
    x1 = screen_width/2
    y1 = screen_height/2

    # 初始移动方向
    x1_change = 0
    y1_change = 0

    # 蛇身列表
    snake_List = []
    Length_of_snake = 1

    # 食物初始位置
    foodx = round(random.randrange(0, screen_width - snake_block_size) / 10.0) * 10.0
    foody = round(random.randrange(0, screen_height - snake_block_size) / 10.0) * 10.0

    clock = pygame.time.Clock()

    # 游戏循环
    while not game_exit:
        while game_over_flag == True:
            screen.fill(black)
            game_over()
            show_score(Length_of_snake - 1)
            pygame.display.update()

            # 如果按下Q键，退出游戏
            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()

        # 处理事件
        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_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

        # 判断是否碰到边缘
        if x1 >= screen_width or x1 < 0 or y1 >= screen_height or y1 < 0:
            game_over_flag = True

        # 更新位置
        x1 += x1_change
        y1 += y1_change

        # 游戏胜利
        if Length_of_snake > 50:
            game_over_text = font_style.render('你赢了！', True, white)
            screen.blit(game_over_text, [screen_width/6, screen_height/3])
            pygame.display.update()
            pygame.time.wait(3000)
            game_exit = True

        # 绘制背景
        screen.fill(black)

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

        # 更新贪吃蛇列表
        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]

        # 判断是否吃到食物
        for x in snake_List[:-1]:
            if x == snake_Head:
                game_over_flag = True

        # 绘制贪吃蛇
        draw_snake(snake_block_size, snake_List)
        show_score(Length_of_snake - 1)

        # 刷新屏幕
        pygame.display.update()

        # 判断是否吃到食物
        if x1 == foodx and y1 == foody:
            foodx = round(random.randrange(0, screen_width - snake_block_size) / 10.0) * 10.0
            foody = round(random.randrange(0, screen_height - snake_block_size) / 10.0) * 10.0
            Length_of_snake += 1

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

    # 退出Pygame
    pygame.quit()

# 开始游戏
gameLoop()