做一个简单的贪吃蛇游戏python程序

以下是一个简单的贪吃蛇游戏Python程序，使用Pygame库实现：

import pygame
import random

pygame.init()

# 游戏窗口尺寸
window_width = 640
window_height = 480

# 贪吃蛇大小
snake_size = 20

# 创建游戏窗口
game_window = pygame.display.set_mode((window_width, window_height))

# 设置游戏标题
pygame.display.set_caption("贪吃蛇游戏")

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

# 设置游戏字体
font = pygame.font.SysFont(None, 24)

# 定义贪吃蛇方向
UP = 1
DOWN = 2
LEFT = 3
RIGHT = 4

# 初始化贪吃蛇位置和方向
snake_x = window_width / 2
snake_y = window_height / 2
snake_direction = RIGHT

# 定义食物位置
food_x = round(random.randrange(0, window_width - snake_size) / snake_size) * snake_size
food_y = round(random.randrange(0, window_height - snake_size) / snake_size) * snake_size

# 定义贪吃蛇身体列表
snake_body = []
snake_length = 1

# 游戏循环
while True:
    # 处理游戏事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()

        # 处理键盘事件
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP and snake_direction != DOWN:
                snake_direction = UP
            elif event.key == pygame.K_DOWN and snake_direction != UP:
                snake_direction = DOWN
            elif event.key == pygame.K_LEFT and snake_direction != RIGHT:
                snake_direction = LEFT
            elif event.key == pygame.K_RIGHT and snake_direction != LEFT:
                snake_direction = RIGHT

    # 移动贪吃蛇
    if snake_direction == UP:
        snake_y -= snake_size
    elif snake_direction == DOWN:
        snake_y += snake_size
    elif snake_direction == LEFT:
        snake_x -= snake_size
    elif snake_direction == RIGHT:
        snake_x += snake_size

    # 判断是否吃到食物
    if snake_x == food_x and snake_y == food_y:
        food_x = round(random.randrange(0, window_width - snake_size) / snake_size) * snake_size
        food_y = round(random.randrange(0, window_height - snake_size) / snake_size) * snake_size
        snake_length += 1

    # 绘制游戏背景
    game_window.fill(white)

    # 绘制食物和贪吃蛇
    pygame.draw.rect(game_window, red, [food_x, food_y, snake_size, snake_size])
    snake_head = []
    snake_head.append(snake_x)
    snake_head.append(snake_y)
    snake_body.append(snake_head)
    if len(snake_body) > snake_length:
        del snake_body[0]

    for segment in snake_body[:-1]:
        if segment == snake_head:
            pygame.quit()
            quit()

    for segment in snake_body:
        pygame.draw.rect(game_window, green, [segment[0], segment[1], snake_size, snake_size])

    # 绘制游戏得分
    score_text = font.render("得分：" + str(snake_length - 1), True, black)
    game_window.blit(score_text, [10, 10])

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

    # 控制游戏帧率
    pygame.time.Clock().tick(10)

程序运行后，可以使用方向键控制贪吃蛇的移动，吃到食物后贪吃蛇长度加1，如果贪吃蛇撞到墙或撞到自己，则游戏结束。程序还会显示当前得分。