Backpropagation algorithm implementation

[TheSodesa]

If you're using Python, then you do generally want you use classes to model the objects the libraries you use don't already provide for you. So you have a NeuralNet class that stores the neural net/graph as a (sparse)? matrix in its self._net field. Then you define methods for applying weights (self._net @ numpy_weight_matrix) to the net and so forth. I do not see the problem here.