Learn Tree Traversal by Building a Binary Search Tree - Step 18

Tell us what’s happening:

why this code getting error?

Your code so far

class TreeNode:
    def __init__(self, key):
        self.key = key
        self.left = None
        self.right = None

class BinarySearchTree:
    def __init__(self):
        self.root = None

    def insert(self,key):
        self.root = self._insert(self.root, key)


# User Editable Region

     def _insert(self, node, key):
        if node is None:
            return TreeNode(key)
        if key < node.key:
            node.left = self._insert(node.left, key)
        elif key > node.key:
            node.right = self._insert(node.right, key)
        return node         

# User Editable Region

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Challenge Information:

Learn Tree Traversal by Building a Binary Search Tree - Step 18

Hi @rizard

You have an extra space indenting the function definition.

Happy coding

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