Keras source codes: how to reach?

Question

To be able to use Keras as a programming tool, sometimes one needs to see the source code of methods. I know that each of the functions in Keras is implemented openly and is accessible to the public. But unfortunately it is not trivial to find the code on the web before you are experienced enough. For example, it is not explained in https://keras.io/ what is the easiest way to find the source for a specific method.

My question here is can someone please point me to the implementation of softmax activation of Keras with Tensorflow backened or recommend how is a good way to get to it?

Answer 1

You can search the repository on github using the search bar. You'll find it in keras/activations.py, which invokes the same function from the keras backend. All the backends are at keras/backend, and the tensorflow backend specifically is at keras/backend/tensorflow_backend.py. In tensorflow, you can find the corresponding kernel definition at tensorflow/core/kernels/softmax_op.