How can I print the values of Keras tensors?

Question

I am implementing own Keras loss function. How can I access tensor values?

What I\'ve tried

def loss_fn(y_true, y_pred):
    print y_true
         


        

Answer 1

If you are using TensorFlow's keras, you can enable Eager Execution:

import tensorflow as tf 
tf.enable_eager_execution()

Afterwards you can print the tensors in your loss function.

In case you get the error message "ValueError: Only TF native optimizers are supported in Eager mode." and you have used 'adam' as an optimizer for example, you can change the model's compile arguments to

model.compile(optimizer = tf.train.AdamOptimizer(), loss = loss_fn, ...)