【第二章】2.2蟒蛇绘制实例编写turtle库的使用

代码实例

#PythonDraw.py.17行代码完成蟒蛇的绘制
import turtle 
turtle.setup(650,350,200,200)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)
turtle.pencolor("purple")
turtle.seth(-40)
for i in range(4):
   turtle.circle(40,80)
   turtle.circle(-40,80)
turtle.circle(40,80/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40*2/3)
turtle.done()

程序的关键：import（保留字）引入了一个绘图库turtle

turtle.setup(width,higth,statrx,statry)

import turtle
turtle.goto(100,100)
turtle.goto(100,-100)
turtle.goto(-100,-100)
turtle.goto(-100,-100)
turtle.goto(0,0)

海龟坐标

turtle的角度坐标系

import turtle
turtle.seth(angle)

import turtle
turtle.left(45)
turtle.fd(150)
turtle.right(135)
turtle.fd(300)
turtle.left(135)
turtle.fd(150)

RGB色彩模式