Using NumPy for array and matrix math in Python Many mathematical operations, especially in machine learning or data science, involve working with matrixes, or lists of numbers.

A NumPy one-dimensional array named wts is created to hold the 26 weights and bias values, and then these values are set to (0.01, 0.02, . . . 0.26), as shown in Figure 2, by calling the setWeights ...

With Python and NumPy getting lots of exposure lately, I'll show how to use those tools to build a simple feed-forward neural network.