用python写个贪吃蛇小程序吧

好的，这是一个简单的贪吃蛇小游戏程序的示例:

import turtle
import time

# 设置窗口大小
turtle.setup(width=600, height=600)

# 创建画布
wn = turtle.Screen()
wn.title("贪吃蛇游戏")

# 创建蛇
snake = turtle.Turtle()
snake.shape("square")
snake.color("black")
snake.penup()

# 设置食物
food = turtle.Turtle()
food.shape("circle")
food.color("red")
food.penup()
food.goto(0, 100)

# 设置初始方向
snake.direction = "stop"

# 定义移动函数
def move():
    if snake.direction == "up":
        y = snake.ycor()
        snake.sety(y + 20)

    if snake.direction == "down":
        y = snake.ycor()
        snake.sety(y - 20)

    if snake.direction == "left":
        x = snake.xcor()
        snake.setx(x - 20)

    if snake.direction == "right":
        x = snake.xcor()
        snake.setx(x + 20)

# 定义按键响应函数
def go_up():
    snake.direction = "up"

def go_down():
    snake.direction = "down"

def go_left():
    snake.direction = "left"

def go_right():
    snake.direction = "right"

# 绑定按键
wn.onkeypress(go_up, "Up")
wn.onkeypress(go_down, "Down")
wn.onkeypress(go_left, "Left")
wn.onkeypress(go_right, "Right")

# 设置焦点
wn.listen()

# 游戏循环
while True:
    wn.update()

    # 判断是否吃到食物
    if snake.distance(food) < 20:
        x = snake.xcor()
        y = snake.ycor()
        food.goto(x, y)

    # 移动
    move()

    # 暂停
    time.sleep(0.1)

# 结束游戏
wn.mainloop()

请注意，这是一个简单的示例，可能需要进一步添加游戏规则、界