生成一段python代码，实现贪吃蛇游戏

以下是一个基本的贪吃蛇游戏的Python代码实现，你可以根据自己的需要进行修改和优化：

import pygame
import time
import random

# 初始化pygame
pygame.init()

# 定义颜色
white = (255, 255, 255)
black = (0, 0, 0)
red = (213, 50, 80)
green = (0, 255, 0)
blue = (50, 153, 213)

# 设置屏幕大小
dis_width = 800
dis_height = 600
dis = pygame.display.set_mode((dis_width, dis_height))
pygame.display.set_caption('贪吃蛇游戏')

# 设置帧率
clock = pygame.time.Clock()

# 定义蛇的大小和速度
snake_block = 10
snake_speed = 15

# 定义字体
font_style = pygame.font.SysFont(None, 50)

# 显示得分
def Your_score(score):
    value = font_style.render("得分: " + str(score), True, white)
    dis.blit(value, [0, 0])

# 画蛇
def our_snake(snake_block, snake_List):
    for x in snake_List:
        pygame.draw.rect(dis, black, [x[0], x[1], snake_block, snake_block])

# 显示消息
def message(msg, color):
    mesg = font_style.render(msg, True, color)
    dis.blit(mesg, [dis_width / 6, dis_height / 3])

# 游戏循环
def gameLoop():
    game_over = False
    game_close = False

    x1 = dis_width / 2
    y1 = dis_height / 2

    x1_change = 0
    y1_change = 0

    # 初始蛇身
    snake_List = []
    Length_of_snake = 1

    # 食物位置
    foodx = round(random.randrange(0, dis_width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, dis_height - snake_block) / 10.0) * 10.0

    while not game_over:

        while game_close == True:
            dis.fill(blue)
            message("游戏结束，按 Q-退出或 C-重新开始", red)
            Your_score(Length_of_snake - 1)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        gameLoop()

        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:
                    x1_change = -snake_block
                    y1_change = 0
                elif event.key == pygame.K_RIGHT:
                    x1_change = snake_block
                    y1_change = 0
                elif event.key == pygame.K_UP:
                    y1_change = -snake_block
                    x1_change = 0
                elif event.key == pygame.K_DOWN:
                    y1_change = snake_block
                    x1_change = 0

        # 超出屏幕范围，游戏结束