Turtle 海龟绘图最早在 Logo 中引入，是一个几何绘图工具，使用海龟绘图可以编写重复执行的代码，画出精细复杂的形状。

在 Python 中，turtle 是一个内部库，特别适合初学者学习，它能提供即时、可见的反馈，还能提供直观的图形输出。

示例1

import turtledef draw1(): colors = ["red", "orange", "yellow", "green", "blue", "purple"] pen = turtle.Turtle() pen.speed(10) turtle.bgcolor("black") pen.pensize(2) for i in range(180): pen.color(colors[i % 6]) pen.forward(200) pen.right(61) pen.forward(100) pen.right(120) pen.forward(100) pen.right(61) pen.forward(200) pen.right(181) pen.hideturtle()draw1()turtle.done()示例2

import turtledef draw2(): colors = ["red", "orange", "yellow", "green", "blue", "purple"] pen = turtle.Turtle() pen.speed(10) turtle.bgcolor("black") pen.pensize(2) initial_size = 30 for i in range(200): pen.color(colors[i % 6]) pen.forward(initial_size + i) pen.left(59) pen.hideturtle()draw2()turtle.done()示例3

import turtledef draw3(): colors = ["red", "orange", "yellow", "green", "blue", "purple"] pen = turtle.Turtle() pen.speed(10) turtle.bgcolor("black") pen.pensize(2) for i in range(50): pen.color(colors[i % 6]) pen.forward(100) pen.left(59) pen.forward(50) pen.left(91) pen.forward(50) pen.left(59) pen.forward(100) pen.right(121) pen.hideturtle()draw3()turtle.done()示例4

import turtledef draw4(): colors = ["red", "orange", "yellow", "green", "blue", "purple"] pen = turtle.Turtle() pen.speed(10) turtle.bgcolor("black") pen.pensize(2) size = 20 for i in range(60): pen.color(colors[i % 6]) pen.forward(size) pen.left(59) pen.forward(size) pen.left(59) pen.forward(size) pen.left(59) pen.forward(size) pen.left(121) size += 2 pen.hideturtle()draw4()turtle.done()示例5

import turtledef draw5(): colors = ["red", "orange", "yellow", "green", "blue", "purple"] pen = turtle.Turtle() pen.speed(10) turtle.bgcolor("black") pen.pensize(2) initial_size = 100 for i in range(200): pen.color(colors[i % 6]) pen.forward(initial_size + i) pen.left(150) pen.hideturtle()draw5()turtle.done()示例6

import turtledef draw6(): colors = ["red", "orange", "yellow", "green", "blue", "purple"] pen = turtle.Turtle() pen.speed(10) turtle.bgcolor("black") pen.pensize(2) for i in range(29): pen.color(colors[i % 6]) pen.circle(100) pen.left(25) pen.hideturtle()draw6()turtle.done()

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