写一个python 贪吃蛇游戏代码

好的，以下是一个简单的 Python 贪吃蛇游戏代码，注释已经尽可能详细，希望能帮到你：

import pygame
import random

# 初始化 Pygame
pygame.init()

# 游戏区域的宽度和高度
WIDTH, HEIGHT = 640, 480

# 食物的大小
FOOD_SIZE = 16

# 创建窗口
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("贪吃蛇游戏")

# 加载字体
font = pygame.font.SysFont("Arial", 24)

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

# 定义蛇的类
class Snake:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.size = 16
        self.speed = 16
        self.direction = "right"
        self.body = [{"x": x, "y": y}]

    def draw(self):
        for part in self.body:
            pygame.draw.rect(screen, GREEN, (part["x"], part["y"], self.size, self.size))

    def move(self):
        if self.direction == "right":
            self.x += self.speed
        elif self.direction == "left":
            self.x -= self.speed
        elif self.direction == "up":
            self.y -= self.speed
        elif self.direction == "down":
            self.y += self.speed

        # 在蛇头的位置插入新的身体
        self.body.insert(0, {"x": self.x, "y": self.y})

        # 删除最后一节身体
        self.body.pop()

    def eat_food(self, food):
        if self.x == food.x and self.y == food.y:
            self.body.append({"x": self.x, "y": self.y})
            return True
        else:
            return False

    def check_collision(self):
        # 检测是否撞墙
        if self.x < 0 or self.x > WIDTH - self.size or self.y < 0 or self.y > HEIGHT - self.size:
            return True

        # 检测是否撞到自己的身体
        for part in self.body[1:]:
            if self.x == part["x"] and self.y == part["y"]:
                return True

        return False

# 定义食物的类
class Food:
    def __init__(self):
        self.x = random.randint(0, WIDTH - FOOD_SIZE)
        self.y = random.randint(0, HEIGHT - FOOD_SIZE)

    def draw(self):
        pygame.draw.rect(screen, RED, (self.x, self.y, FOOD_SIZE, FOOD_SIZE))

# 创建蛇和食物
snake = Snake(WIDTH / 2, HEIGHT / 2)
food = Food()

# 游戏循环
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_RIGHT:
                snake.direction = "right"
            elif event.key == pygame.K_LEFT:
                snake.direction = "left"
            elif event.key == pygame.K_UP:
                snake.direction = "up"
            elif event.key == pygame.K_DOWN:
                snake.direction = "down"

    # 移动蛇
    snake.move()

    # 检测是否吃到食物
    if snake.eat_food(food):
        food = Food()

    # 绘制游戏界面
    screen.fill(BLACK)
    snake.draw()
    food.draw()

    # 检测游戏是否结束
    if snake.check_collision():
        text = font.render("游戏结束！", True, WHITE)
        screen.blit(text, (WIDTH / 2 - text.get_width() / 2, HEIGHT / 2 - text.get_height() / 2))
        pygame.display.update()
        pygame.time.wait(2000)
        pygame.quit()
        exit()

    # 更新屏幕
    pygame.display.update()
    pygame.time.Clock().tick(10)

运行该代码后，你就可以玩一下简单的贪吃蛇游戏了。希望对你有所帮助！