python实现贪吃蛇小游戏

好的，以下是一个简单的 Python 贪吃蛇小游戏的实现示例。

import turtle
import time
import random

delay = 0.1

# 初始化窗口
win = turtle.Screen()
win.title("贪吃蛇小游戏")
win.bgcolor("green")
win.setup(width=600, height=600)

# 初始化蛇头
head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("black")
head.penup()
head.goto(0, 0)
head.direction = "stop"

# 初始化食物
food = turtle.Turtle()
food.speed(0)
food.shape("circle")
food.color("red")
food.penup()
food.goto(0, 100)

segments = []

# 定义蛇头移动函数
def move():
    if head.direction == "up":
        y = head.ycor()
        head.sety(y + 20)
    if head.direction == "down":
        y = head.ycor()
        head.sety(y - 20)
    if head.direction == "right":
        x = head.xcor()
        head.setx(x + 20)
    if head.direction == "left":
        x = head.xcor()
        head.setx(x - 20)

# 定义蛇头方向函数
def go_up():
    if head.direction != "down":
        head.direction = "up"

def go_down():
    if head.direction != "up":
        head.direction = "down"

def go_right():
    if head.direction != "left":
        head.direction = "right"

def go_left():
    if head.direction != "right":
        head.direction = "left"

# 注册键盘事件
win.listen()
win.onkeypress(go_up, "Up")
win.onkeypress(go_down, "Down")
win.onkeypress(go_right, "Right")
win.onkeypress(go_left, "Left")

# 循环游戏
while True:
    win.update()

    # 判断蛇头是否碰到边界
    if head.xcor() > 290 or head.xcor() < -290 or head.ycor() > 290 or head.ycor() < -290:
        time.sleep(1)
        head.goto(0, 0)
        head.direction = "stop"

        for segment in segments:
            segment.goto(1000, 1000)

        segments.clear()

    # 判断蛇头是否吃到食物
    if head.distance(food) < 20:
        x = random.randint(-290, 290)
        y = random.randint(-290, 290)
        food.goto(x, y)

        new_segment = turtle.Turtle()
        new_segment.speed(0)
        new_segment.shape("square")
        new_segment.color("grey")
        new_segment.penup()
        segments.append(new_segment)

    # 移动蛇尾
    for index in range(len(segments)-1, 0, -1):
        x = segments[index-1].xcor()
        y = segments[index-1].ycor()
        segments[index].goto(x, y)

    # 移动蛇头
    if len(segments) > 0:
        x = head.xcor()
        y = head.ycor()
        segments[0].goto(x, y)

    move()

    # 判断蛇头是否碰到身体
    for segment in segments:
        if segment.distance(head) < 20:
            time.sleep(