Note that `print_tensor`

returns a new tensor identical to `x`

which should
be used in the following code. Otherwise the print operation is not taken
into account during evaluation.

`k_print_tensor(x, message = "")`

- x
Tensor to print.

- message
Message to print jointly with the tensor.

The same tensor `x`

, unchanged.

This function is part of a set of Keras backend functions that enable lower level access to the core operations of the backend tensor engine (e.g. TensorFlow, CNTK, Theano, etc.).

You can see a list of all available backend functions here: https://keras.rstudio.com/articles/backend.html#backend-functions.