Neural Network Projects with Python

Training a neural network from scratch in Python

Now that we understand the basic architecture of a neural network, let's create our own neural network from scratch in Python.

First, let's create a NeuralNetwork class in Python:

import numpy as npclass NeuralNetwork:    def __init__(self, x, y):        self.input    = x        self.weights1 = np.random.rand(self.input.shape[1],4)         self.weights2 = np.random.rand(4,1)         self.y        = y        self.output = np.zeros(self.y.shape)

Notice that in the preceding code, we initialize the weights (self.weights1 and self.weights2) as a NumPy array with random values. NumPy arrays are used to represent multidimensional arrays in Python. The exact dimensions of our weights are specified in the parameters of the np.random.rand() function. ...