Keras (https://keras.io) is a powerful Python toolkit that allows modeling and training complex deep learning architectures with minimum effort. It relies on low-level frameworks, such as Tensorflow, Theano, or CNTK, and provides high-level blocks to build the single layers of a model. In this book, we need to be very pragmatic because there's no room for a complete explanation; however, all the examples will be structured to allow the reader to try different configurations and options without a full knowledge (for further details, I suggest the book Deep Learning with Keras, Gulli A, Pal S., Packt Publishing).
In this example, we want to build a small MLP with a single hidden layer to solve the XOR problem (the ...
