初学Python，画了个二叉树，附效果图和代码

angle=15 import turtle as t def Draw(n,length): if n>0: n1=n length1=length t.right(angle) t.fd(length) n=n-1 length=length2/3 Draw(n,length) t.right(angle) t.fd(-length1)#length的值已经改变 t.left(angle2)

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