Obtain a reference to the Python module used for the implementation of Keras.
implementation()
Reference to the Python module used for the implementation of Keras.
There are currently two Python modules which implement Keras:
keras ("keras")
tensorflow.keras ("tensorflow")
This function returns a reference to the implementation being currently
used by the keras package. The default implementation is "keras".
You can override this by setting the KERAS_IMPLEMENTATION
environment
variable to "tensorflow".