turtle

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.down()

北理工慕课

import turtle
turtle.setup(3000,3000,0,0)


x=list(range(500))
for i in x:
    turtle.left(20)
    turtle.fd(0.5*i)
turtle.down()


自己胡乱写的好像可以画出来接近圆形啊哈哈

left()
参数60时候，是个正六边形

import turtle
turtle.setup(3000,3000,0,0)


x=list(range(500))
for i in x:
    turtle.left(314)
    turtle.fd(100)
turtle.down()

圆形，

import turtle
turtle.setup(3000,3000,0,0)

x=list(range(115))
for i in x:
turtle.left(3.1415926)
turtle.fd(10)
turtle.down()

真正的圆形

import turtle
turtle.setup(3000,3000,0,0)

x=list(range(500))
for i in x:
turtle.left(514)
turtle.fd(100)
turtle.down()

七角星