帮我用python做一个150行代码的贪吃蛇小游戏

好的，我可以帮你实现一个简单的贪吃蛇小游戏，但需要提醒的是，150行代码可能不够完整和优化，仅供参考。以下是代码实现：

import pygame
import random

# 初始化 pygame
pygame.init()

# 定义游戏界面大小
width = 800
height = 600

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
gray = (128, 128, 128)

# 创建游戏界面
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("贪吃蛇小游戏")

# 定义字体
font = pygame.font.SysFont(None, 30)

# 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

# 定义蛇的初始移动方向
direction = "right"

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

# 定义分数
score = 0


# 绘制蛇的函数
def draw_snake(snake_size, snake_list):
    for x, y in snake_list:
        pygame.draw.rect(screen, green, [x, y, snake_size, snake_size])


# 显示分数的函数
def show_score(score):
    text = font.render("分数：" + str(score), True, black)
    screen.blit(text, (10, 10))


# 游戏结束的函数
def game_over():
    text = font.render("游戏结束！", True, red)
    screen.blit(text, (width / 2 - 80, height / 2 - 20))


# 游戏循环
game_exit = False
clock = pygame.time.Clock()

snake_list = []
snake_length = 1

while not game_exit:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_exit = True
        elif 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 == "right":
        snake_x += snake_speed
    elif direction == "left":
        snake_x -= snake_speed
    elif direction == "up":
        snake_y -= snake_speed
    elif direction == "down":
        snake_y += snake_speed

    # 判断蛇是否吃到食物
    if snake_x == food_x and snake_y == food_y:
        food_x = round(random.randrange(0, width - snake_size) / 10.0) * 10.0
        food_y = round(random.randrange(0, height - snake_size) / 10.0) * 10.0
        snake_length += 1
        score += 10

    # 绘制游戏界面
    screen.fill(white)
    pygame.draw.rect(screen, red, [food_x, food_y, snake_size, snake_size])

    snake_head = []
    snake_head.append(snake_x)
    snake_head.append(snake_y)
    snake_list.append(snake_head)

    if len(snake_list) > snake_length:
        del snake_list[0]

    for each in snake_list[:-1]:
        if each == snake_head:
            game_over()

    draw_snake(snake_size, snake_list)
    show_score(score)
    pygame.display.update()

    # 判断蛇是否撞到边界
    if snake_x >= width or snake_x < 0 or snake_y >= height or snake_y < 0:
        game_over()

    # 控制游戏帧率
    clock.tick(15)

# 退出 pygame
pygame.quit()

以上就是一个简单的贪吃蛇小游戏代码，希望能够帮到你。