1.简介

使用了turtle库来创建图形界面，你可以使用键盘的W、A、S、D键来控制蛇的移动方向。蛇吃到食物后，身体会增长，如果蛇撞到自己或者游戏边界，游戏就会结束。

2. 代码

import turtle
import time
import random

delay = 0.1

# 生成食物的位置
food = turtle.Turtle()
food.shape("circle")
food.color("red")
food.penup()
food.goto(random.randint(-15, 15), random.randint(-15, 15))
food.speed(0)

# 蛇头
head = turtle.Turtle()
head.shape("square")
head.color("blue")
head.penup()
head.goto(0, 0)
head.direction = "stop"

# 蛇的食物
segments = []

# 用于控制蛇的移动
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 == "left":
        x = head.xcor()
        head.setx(x - 20)

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

#游戏结束
def game_over():
    # 提示游戏结束
    print("Game Over")
    turtle.write("Game Over", align="center", font=("Courier", 24, "normal"))

    head.goto(0, 0)
    head.direction = "stop"

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

    turtle.done()

# 键盘绑定
def go_up():
    if head.direction != "down":
        head.direction = "up"
def go_down():
    if head.direction != "up":
        head.direction = "down"
def go_left():
    if head.direction != "right":
        head.direction = "left"
def go_right():
    if head.direction != "left":
        head.direction = "right"

# 键盘监听
turtle.listen()
turtle.onkey(go_up, "w")
turtle.onkey(go_down, "s")
turtle.onkey(go_left, "a")
turtle.onkey(go_right, "d")

# 主游戏循环
while True:
    turtle.update()

    # 检查碰撞边界
    if head.xcor()> 290 or head.xcor() < -290 or head.ycor() > 290 or head.ycor() < -290:
        game_over()

    # 检查蛇头是否接触到食物
    if head.distance(food) < 20:
        # 移动食物到随机位置
        x = random.randint(-15, 15)
        y = random.randint(-15, 15)
        food.goto(x, y)

        # 添加蛇的身体段
        new_segment = turtle.Turtle()
        new_segment.shape("square")
        new_segment.color("grey")
        new_segment.penup()
        segments.append(new_segment)

    # 移动蛇身体的最后部分到前一部分的位置
    for index in range(len(segments)-1, 0, -1):
        x = segments[index-1].xcor()
        y = segments[index-1].ycor()
        segments[index].goto(x, y)

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

    move()

    # 检查蛇头碰到身体
    for segment in segments:
        if 0 < segment.distance(head) < 20:
            game_over()

    time.sleep(delay)

turtle.done()