Congratulations, you have implemented a tree in Python.

For review, in our implementation:

• Trees are a Python class called TreeNode.
• A TreeNode has two properties, value and children.
• Nodes hold any type of data inside value.
• children is a list, which can be empty or hold other instances of TreeNode.
• We add to children by using the list method .append.
• We remove from children by filtering the list.