Depth First Search algorithm in Python (Multiple Examples)

Depth First Search is a popular graph traversal algorithm. In this tutorial, We will understand how it works, along with examples; and how we can implement it in Python.
We will be looking at the following sections:

Introduction

Graphs and Trees are one of the most important data structures we use for various applications in Computer Science.
They represent data in the form of nodes, which are connected to other nodes through ‘edges’.