Python：函数递归使用

from turtle import * def darw(): level=5 koch(400,level) right(120) koch(400,level) right(120) koch(400,level) def koch(size,n): if n==0: fd(size) else: for an in [0,60,-120,60]: left(an) koch(size/3,n-1) def main(): setup(600,600) speed(0) penup() goto(-200,100) pendown() darw() hideturtle() main()