tf.nn.compute_average_loss

Scales per-example losses with sample_weights and computes their average.

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Compat aliases for migration

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tf.compat.v1.nn.compute_average_loss

tf.nn.compute_average_loss(
    per_example_loss, sample_weight=None, global_batch_size=None
)

Usage with distribution strategy and custom training loop:

with strategy.scope():
  def compute_loss(labels, predictions, sample_weight=None):

    # If you are using a `Loss` class instead, set reduction to `NONE` so that
    # we can do the reduction afterwards and divide by global batch size.
    per_example_loss = tf.keras.losses.sparse_categorical_crossentropy(
        labels, predictions)

    # Compute loss that is scaled by sample_weight and by global batch size.
    return tf.nn.compute_average_loss(
        per_example_loss,
        sample_weight=sample_weight,
        global_batch_size=GLOBAL_BATCH_SIZE)