使用python实现画出一段给定角度的近似圆弧

import turtle
import time
import math


def circle(bob,r,angle):
    n = 720
    jiaoDu = 360/n
    juLi=2*r*math.sin(jiaoDu/180*math.pi/2)
    bob.pu()
    bob.fd(r)
    bob.lt(90+jiaoDu/2)
    bob.pd()
    for i in range(angle*n//360):
        bob.fd(juLi)
        bob.lt(jiaoDu)
        time.sleep(0.01)
    juli2=juLi * (angle%(360/n))/(360/n)
    bob.fd(juli2)

r=float(input("请输入半径："))
angle=int(input("请输入角度："))
bob=turtle.Turtle()
circle(bob,r,angle)

turtle.mainloop()