实例：蟒蛇绘制举一反三
来自CloudWiki
#PythonDraw. py
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(48,0)
turtle.circle(-4o,0)
turtle.circle(4e,80/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40*2/3)
turtle.done()
