生成一个贪吃蛇小游戏的python代码

以下是一个简单的贪吃蛇小游戏的Python代码，你可以根据自己的需要进行修改和完善：

import pygame
import random

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

# 定义游戏窗口大小
width = 400
height = 400

# 初始化pygame
pygame.init()

# 创建游戏窗口
window = pygame.display.set_mode((width, height))
pygame.display.set_caption("贪吃蛇小游戏")

# 定义蛇的初始位置和大小
snake_size = 10
snake_x = width / 2
snake_y = height / 2

# 定义蛇的移动速度
snake_speed = 10

# 定义食物的初始位置和大小
food_size = 10
food_x = round(random.randrange(0, width - food_size) / 10.0) * 10.0
food_y = round(random.randrange(0, height - food_size) / 10.0) * 10.0

# 定义蛇的移动方向
direction = "right"

# 定义游戏循环标志
game_over = False

# 定义计分变量
score = 0

# 定义游戏时钟
clock = pygame.time.Clock()

# 定义画蛇的函数
def draw_snake(snake_size, snake_list):
    for x in snake_list:
        pygame.draw.rect(window, black, [x[0], x[1], snake_size, snake_size])

# 定义游戏结束函数
def gameover():
    font = pygame.font.SysFont(None, 25)
    text = font.render("游戏结束，最终得分：" + str(score), True, red)
    window.blit(text, [width/3, height/3])
    pygame.display.update()
    pygame.time.delay(2000)

# 游戏循环
while not game_over:
    # 处理游戏事件
    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:
                direction = "left"
            elif event.key == pygame.K_RIGHT:
                direction = "right"
            elif event.key == pygame.K_UP:
                direction = "up"
            elif event.key == pygame.K_DOWN:
                direction = "down"

    # 移动蛇的位置
    if direction == "left":
        snake_x -= snake_speed
    elif direction == "right":
        snake_x += snake_speed
    elif direction == "up":
        snake_y -= snake_speed
    elif direction == "down":
        snake_y += snake_speed

    # 判断蛇是否吃到了食物
    if snake_x == food_x and snake_y == food_y:
        food_x = round(random.randrange(0, width - food_size) / 10.0) * 10.0
        food_y = round(random.randrange(0, height - food_size) / 10.0) * 10.0
        score += 1

    # 绘制游戏窗口
    window.fill(white)
    pygame.draw.rect(window, red, [food_x, food_y, food_size, food_size])
    snake_head = [snake_x, snake_y]
    snake_list = []
    snake_list.append(snake_head)
    draw_snake(snake_size, snake_list)

    # 判断蛇是否撞到了边界或自己的身体
    if snake_x >= width or snake_x < 0 or snake_y >= height or snake_y < 0:
        gameover()
        game_over = True

    # 更新游戏窗口
    pygame.display.update()

    # 设置游戏帧率
    clock.tick(20)

# 退出游戏
pygame.quit()
quit()

这是一个比较简单的贪吃蛇小游戏，你可以根据自己的需要进行修改和完善，添加更多的功能和特效，让游戏更加有趣。