Python测试和训练樱花飘落（Python版本）

 from turtle import *

    
 from random import *
    
 from math import *
    
 import turtle as t
    
 import random as r
    
 def tree(n,l):
    
     pd()#下笔
    
     #阴影效果
    
     t = cos(radians(heading()+45))/8+0.25
    
     pencolor(t,t,t)
    
     pensize(n/3)
    
     forward(l)#画树枝
    
  
    
     if n>0:
    
     b = random()*15+10 #右分支偏转角度
    
     c = random()*15+10 #左分支偏转角度
    
     d = l*(random()*0.25+0.7) #下一个分支的长度
    
     #右转一定角度,画右分支
    
     right(b)