turtle库的几个简单案例，代码可直接运行（python经典编程案例）

Posted 2021-09-04 cui_yonghua

turtle官网：https://docs.python.org/3/library/turtle.html。这个库被介绍为一个最常用的用来给孩子们介绍编程知识的方法库，其主要是用于程序设计入门，是标准库之一，利用turtle可以制作很多复杂的绘图。

下面是几个简单案例：

1. 画三角形

from turtle import forward, right


def triangle(sidelength):
    for i in range(3):
        forward(sidelength)
        right(120)


triangle(300)

2. 画正方形并向右旋转

from turtle import forward, right


def square():
    for i in range(4):
        forward(100)
        right(90)


for i in range(60):
    square()
    right(10)

3. 画多边形

from turtle import forward, right


def polygon(sides):
    for i in range(sides):
        forward(100)
        right(360/sides)


# 六边形传个6就行，几边形就传几
polygon(6)

4. 画螺旋图案

画正方形并向右旋转，边长依次递增。

from turtle import forward, right


def square(sidelength):
    for i in range(4):
        forward(sidelength)
        right(90)


def spiral():
    length = 5
    for i in range(60):
        square(length)
        right(5)
        length += 5


spiral()

5. 画五角星并旋转

from turtle import forward, right


def star(sidelength):
    for i in range(5):
        forward(sidelength)
        right(144)


def star_spiral():
    length = 5
    for i in range(60):
        star(length)
        right(5)
        length += 5


star_spiral()

6. 画5个五角星

from turtle import *

def drawStar(x, y):
    pu()
    goto(x, y)
    pd()
    # set heading: 0
    seth(0)
    for i in range(5):
        fd(40)
        rt(144)

for x in range(0, 250, 50):
    drawStar(x, 0)

done()