Vytisknout strom funkce python

python tisknout binární strom

class Node:
    def __init__(self,data):
       self.data=data
       self.left=None
       self.right=None
       self.parent=None

class binarytree:
   def __init__(self):
     self.root=None
     self.size=0

   def insert(self,data):
     if self.root==None:
        self.root=Node(data)

    else:
        current=self.root
        while 1:
            if data < current.data:
                if current.left:
                    current=current.left
                else:
                    new=Node(data)
                    current.left=new
                    break;
            elif data > current.data:
                if current.right:
                    current=current.right
                else:
                    new=Node(data)
                    current.right=new
                    break;
            else:
                break



 b=binarytree()