turtle库的几个简单案例，代码可直接运行（python经典编程案例）

谁践踏了优雅 2022-09-03 14:21 171阅读 0赞

turtle官网：[https://docs.python.org/3/library/turtle.html][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()

[https_docs.python.org_3_library_turtle.html]: https://docs.python.org/3/library/turtle.html