Too Long; Didn't Read
<a href="https://keras.io/">Keras</a> is a neural networks API that runs on top of <a href="https://www.tensorflow.org/">Tensorflow</a>, <a href="http://deeplearning.net/software/theano/">Theano</a>, or <a href="https://www.microsoft.com/en-us/cognitive-toolkit/">CNTK</a>. Essentially, Keras provides high level building blocks for developing deep learning models and uses backend engines like Tensorflow to operate. As a “hello world” tutorial to Keras, we will be building a handwritten digit classifier using a convolutional neural network (CNN)!