python turtle库的自带效果

turtle库大家都很熟悉了，今天我不是来介绍他的用法，而是他本身的效果。

C:\Program Files\Python35\Lib\turtle.py

这个是turtle库在我电脑里面的地址，用IDLE打开它。

然后运行它

大家也可以用以下代码试一试（从turtle.py粘出来的）

import tkinter as TK
import types
import math
import time
import inspect
import sys

from os.path import isfile, split, join
from copy import deepcopy
from tkinter import simpledialog
from turtle import *
if __name__ == "__main__":
    def switchpen():
        if isdown():
            pu()
        else:
            pd()

    def demo1():
        """Demo of old turtle.py - module"""
        reset()
        tracer(True)
        up()
        backward(100)
        down()
        # draw 3 squares; the last filled
        width(3)
        for i in range(3):
            if i == 2:
                begin_fill()
            for _ in range(4):
                forward(20)
                left(90)
            if i == 2:
                color("maroon")
                end_fill()
            up()
            forward(30)
            down()
        width(1)
        color("black")
        # move out of the way
        tracer(False)
        up()
        right(90)
        forward(100)
        right(90)
        forward(100)
        right(180)
        down()
        # some text
        write("startstart", 1)
        write("start", 1)
        color("red")
        # staircase
        for i in range(5):
            forward(20)
            left(90)
            forward(20)
            right(90)
        # filled staircase
        tracer(True)
        begin_fill()
        for i in range(5):
            forward(20)
            left(90)
            forward(20)
            right(90)
        end_fill()
        # more text

    def demo2():
        """Demo of some new features."""
        speed(1)
        st()
        pensize(3)
        setheading(towards(0, 0))
        radius = distance(0, 0)/2.0
        rt(90)
        for _ in range(18):
            switchpen()
            circle(radius, 10)
        write("wait a moment...")
        while undobufferentries():
            undo()
        reset()
        lt(90)
        colormode(255)
        laenge = 10
        pencolor("green")
        pensize(3)
        lt(180)
        for i in range(-2, 16):
            if i > 0:
                begin_fill()
                fillcolor(255-15*i, 0, 15*i)
            for _ in range(3):
                fd(laenge)
                lt(120)
            end_fill()
            laenge += 10
            lt(15)
            speed((speed()+1)%12)
        #end_fill()

        lt(120)
        pu()
        fd(70)
        rt(30)
        pd()
        color("red","yellow")
        speed(0)
        begin_fill()
        for _ in range(4):
            circle(50, 90)
            rt(90)
            fd(30)
            rt(90)
        end_fill()
        lt(90)
        pu()
        fd(30)
        pd()
        shape("turtle")

        tri = getturtle()
        tri.resizemode("auto")
        turtle = Turtle()
        turtle.resizemode("auto")
        turtle.shape("turtle")
        turtle.reset()
        turtle.left(90)
        turtle.speed(0)
        turtle.up()
        turtle.goto(280, 40)
        turtle.lt(30)
        turtle.down()
        turtle.speed(6)
        turtle.color("blue","orange")
        turtle.pensize(2)
        tri.speed(6)
        setheading(towards(turtle))
        count = 1
        while tri.distance(turtle) > 4:
            turtle.fd(3.5)
            turtle.lt(0.6)
            tri.setheading(tri.towards(turtle))
            tri.fd(4)
            if count % 20 == 0:
                turtle.stamp()
                tri.stamp()
                switchpen()
            count += 1
        tri.write("CAUGHT! ", font=("Arial", 16, "bold"), align="right")
        tri.pencolor("black")
        tri.pencolor("red")

        def baba(xdummy, ydummy):
            clearscreen()
            bye()

        time.sleep(2)

        while undobufferentries():
            tri.undo()
            turtle.undo()
        tri.fd(50)
        tri.write("  Click me!", font = ("Courier", 12, "bold") )
        tri.onclick(baba, 1)

    demo1()
    demo2()
    exitonclick()

 （为什么我不能上传视频！）

额，我录了一个视频，上传不了，sorry!

以上（除了上面两句）就是全部内容了，总体来说，海龟自带的还是挺有趣的。