用python做一个贪吃蛇

好的，下面是一个用Python实现的简单贪吃蛇游戏，使用了Pygame库。

import pygame
import random

# 初始化Pygame
pygame.init()

# 游戏窗口大小
WINDOW_WIDTH = 600
WINDOW_HEIGHT = 600

# 定义颜色
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
GREEN = (0, 255, 0)

# 创建游戏窗口
window = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))
pygame.display.set_caption("贪吃蛇")

# 定义蛇的初始位置和大小
snake_x = [300, 280, 260]
snake_y = [300, 300, 300]
snake_size = 20

# 定义食物的初始位置和大小
food_x = round(random.randrange(0, WINDOW_WIDTH - snake_size) / 20.0) * 20.0
food_y = round(random.randrange(0, WINDOW_HEIGHT - snake_size) / 20.0) * 20.0
food_size = 20

# 定义蛇的移动速度
snake_speed = 20

# 定义蛇的移动方向
direction = "right"

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

# 定义游戏结束函数
def game_over():
    text = font.render("游戏结束！", True, RED)
    window.blit(text, [WINDOW_WIDTH / 2, WINDOW_HEIGHT / 2])
    pygame.display.update()
    pygame.time.delay(2000)
    pygame.quit()
    quit()

# 定义游戏循环
while True:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()
        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"

    # 移动蛇的身体
    for i in range(len(snake_x) - 1, 0, -1):
        snake_x[i] = snake_x[i - 1]
        snake_y[i] = snake_y[i - 1]

    # 移动蛇的头部
    if direction == "left":
        snake_x[0] -= snake_speed
    elif direction == "right":
        snake_x[0] += snake_speed
    elif direction == "up":
        snake_y[0] -= snake_speed
    elif direction == "down":
        snake_y[0] += snake_speed

    # 判断蛇是否吃到食物
    if snake_x[0] == food_x and snake_y[0] == food_y:
        food_x = round(random.randrange(0, WINDOW_WIDTH - snake_size) / 20.0) * 20.0
        food_y = round(random.randrange(0, WINDOW_HEIGHT - snake_size) / 20.0) * 20.0
        snake_x.append(snake_x[-1])
        snake_y.append(snake_y[-1])

    # 判断蛇是否撞墙或者自己
    if snake_x[0] >= WINDOW_WIDTH or snake_x[0] < 0 or snake_y[0] >= WINDOW_HEIGHT or snake_y[0] < 0:
        game_over()

    for i in range(1, len(snake_x)):
        if snake_x[0] == snake_x[i] and snake_y[0] == snake_y[i]:
            game_over()

    # 绘制游戏界面
    window.fill(WHITE)
    pygame.draw.rect(window, GREEN, [food_x, food_y, food_size, food_size])

    for i in range(len(snake_x)):
        pygame.draw.rect(window, BLACK, [snake_x[i], snake_y[i], snake_size, snake_size])

    pygame.display.update()
    pygame.time.delay(100)

希望这个简单的示例可以帮助你入门Python编程和游戏开发。