tf.keras.backend.in_train_phase

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Selects x in train phase, and alt otherwise.

Note that alt should have the same shape as x.

Arguments
x What to return in train phase (tensor or callable that returns a tensor).
alt What to return otherwise (tensor or callable that returns a tensor).
training Optional scalar tensor (or Python boolean, or Python integer) specifying the learning phase.
Returns
Either x or alt based on the training flag. the training flag defaults to K.learning_phase().

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Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/versions/r1.15/api_docs/python/tf/keras/backend/in_train_phase