无法识别来自导入脚本的Python方法

Question

I am using anaconda notebook as my main python tool. I have a script called tree.py and a notebook test.ipynb

this is what I have in tree.py :

class bst(object):
   def __init__(self,val):
      self.val = val
      self.left = None
      self.right = None
   def setleft(self,l):
      l = bst(l)
      self.left = l

I imported it in the ipynb and tried to do this:

s = tree.bst(2)
s.setleft(3)

and it gave me an AttributeError saying "bst object has no attribute setleft". What is wrong with my code?

Answer 1

In the second file you've created, put in this line of code at the beginning (please make sure that the two files are in the same directory)

import tree

and after write:

s = tree.bst(2)
s.setleft(3)