python turtle库-读书笔记

 1 import turtle
 2 turtle.setup(800,400,200,200)
 3 turtle.pensize(2)
 4 turtle.fillcolor("red")
 5 turtle.begin_fill()
 6 turtle.fd(180)
 7 turtle.seth(-144)
 8 turtle.fd(180)
 9 turtle.seth(72)
10 turtle.fd(180)
11 turtle.seth(-72)
12 turtle.fd(180)
13 turtle.seth(144)
14 turtle.fd(180)
15 turtle.end_fill()
16 turtle.seth(72)
17 import math
18 n=90/math.sin(2/5*math.pi)
19 turtle.circle(-n,360)