## How do you traverse a binary search tree in Python?

First we traverse the left subtree, then the right subtree and finally the root node. In the below python program, we use the Node class to create place holders for the root node as well as the left and right nodes. Then we create a insert function to add data to the tree.

**What is a traversal in Python?**

Traversing just means to process every character in a string, usually from left end to right end. Python allows for 2 ways to do this – both useful but not identical.

**How do you preorder traversal Python?**

Binary Tree Preorder Traversal in Python

- make empty lists called res and st.
- node := root.
- while node or st is not empty. while node is not null, then. insert val of node into res, insert node into st and set node := left of node. temp := last element of st, and delete last element of st.
- return res.

### What will be the Postorder traversal of the given binary tree?

Algorithm Postorder(tree) 1. Traverse the left subtree, i.e., call Postorder(left-subtree) 2. Traverse the right subtree, i.e., call Postorder(right-subtree) 3. Postorder traversal is used to delete the tree.

**What is level order traversal in binary tree?**

Given a binary tree, print its nodes level by level, i.e., print all nodes of level 1 first, followed by nodes of level 2 and so on… Trees can also be traversed in level order, where we visit every node on a level before going to a lower level. …

**What is level in binary tree?**

Let’s understand what a level in a Binary Tree means. A level is the number of parent nodes corresponding to a given a node of the tree. It is basically the number of ancestors from that node until the root node. This is simply the length of the path from the root to the deepest node in the tree.

#### What is self in Python?

self represents the instance of the class. By using the “self” keyword we can access the attributes and methods of the class in python. It binds the attributes with the given arguments. The reason you need to use self. is because Python does not use the @ syntax to refer to instance attributes.

**How do you create a binary tree in Python?**

Once we have defined the Node class, we can initialize our Binary Tree:

- class Node: def __init__(self, data): self.
- def inorder(node): if node: # Recursively call inorder on the left subtree until it reaches a leaf node inorder(node.
- def preorder(node): if node: # Print the value of the root node first print(node.

**How do you implement a pre order traversal?**

The logic of pre-order traversal is coded on the preOrder(TreeNode node) method. The recursive algorithm first visits the node e.g. it prints it the value then recursive call the preOrder() method with left subtree, followed by right subtree.

## What is inorder traversal in binary tree?

The InOrder traversal is one of the three popular ways to traverse a binary tree data structure, the other two being the preOrder and postOrder. During the in-order traversal algorithm, the left subtree is explored first, followed by root, and finally nodes on the right subtree.

**How do you know if a binary tree is full?**

1) If a binary tree node is NULL then it is a full binary tree. 2) If a binary tree node does have empty left and right sub-trees, then it is a full binary tree by definition. 3) If a binary tree node has left and right sub-trees, then it is a part of a full binary tree by definition.