python写贪吃蛇游戏的代码

好的，以下是一个简单的Python贪吃蛇游戏的代码：

import pygame
import random

# 初始化
pygame.init()

# 设置窗口尺寸
window_width = 640
window_height = 480
window = pygame.display.set_mode((window_width, window_height))

# 设置颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)

# 设置字体
font = pygame.font.SysFont(None, 25)

# 设置游戏速度
clock = pygame.time.Clock()
fps = 10

# 定义方块大小和间隔
block_size = 10
block_gap = 2

# 定义蛇的类
class Snake:
    def __init__(self):
        self.length = 1
        self.positions = [(window_width / 2, window_height / 2)]
        self.direction = random.choice([pygame.K_UP, pygame.K_DOWN, pygame.K_LEFT, pygame.K_RIGHT])
        self.color = green

    def get_head_position(self):
        return self.positions[0]

    def turn(self, point):
        if self.length > 1 and (point[0]*-1, point[1]*-1) == self.direction:
            return
        else:
            self.direction = point

    def move(self):
        cur = self.get_head_position()
        x, y = self.direction
        new = ((cur[0] + (x*block_size)), (cur[1] + (y*block_size)))
        if new in self.positions[2:]:
            self.reset()
        else:
            self.positions.insert(0, new)
            if len(self.positions) > self.length:
                self.positions.pop()

    def reset(self):
        self.length = 1
        self.positions = [(window_width / 2, window_height / 2)]
        self.direction = random.choice([pygame.K_UP, pygame.K_DOWN, pygame.K_LEFT, pygame.K_RIGHT])

    def draw(self, surface):
        for p in self.positions:
            r = pygame.Rect((p[0], p[1]), (block_size, block_size))
            pygame.draw.rect(surface, self.color, r)
            pygame.draw.rect(surface, black, r, 1)

    def handle_keys(self):
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                exit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_UP:
                    self.turn((0, -1))
                elif event.key == pygame.K_DOWN:
                    self.turn((0, 1))
                elif event.key == pygame.K_LEFT:
                    self.turn((-1, 0))
                elif event.key == pygame.K_RIGHT:
                    self.turn((1, 0))

# 定义食物的类
class Food:
    def __init__(self):
        x = random.randint(0, (window_width-block_size) // block_size) * block_size
        y = random.randint(0, (window_height-block_size) // block_size) * block_size
        self.position = (x, y)
        self.color = red

    def draw(self, surface):
        r = pygame.Rect((self.position[0], self.position[1]), (block_size, block_size))
        pygame.draw.rect(surface, self.color, r)
        pygame.draw.rect(surface, black, r, 1)

# 初始化蛇和食物
snake = Snake()
food = Food()

# 游戏循环
while True:
    # 处理按键事件
    snake.handle_keys()

    # 移动蛇
    snake.move()

    # 判断蛇是否吃到食物
    if snake.get_head_position() == food.position:
        snake.length += 1
        food = Food()

    # 绘制背景
    window.fill(white)

    # 绘制蛇和食物
    snake.draw(window)
    food.draw(window)

    # 更新显示
    pygame.display.update()

    # 控制游戏速度
    clock.tick(fps)

这是一个比较简单的贪吃蛇游戏，可以根据需要进行修改和扩展。