How Neural Networks Actually Work -- Python Implementation (Simplified)

Neural Network (NN) is a black box for so many people. We know that it works, but we don't understand how it works. This article will demystify this belief by working on some examples to show how a neural network really works. If some terms are not so clear in this article, I have already written two more articles to cover the real basics: article 1 and article 2. In this first example, let us consider a simple case where we have a dataset of 3 features, a target variable and just one training example (in reality we can never have this kind of data, but, it will make a very good start). Fact 1: The structure of the data influences the architecture chosen for modelling.