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/TensorFlow 2.4

tf.keras.losses.get

Retrieves a Keras loss as a function/Loss class instance.

The identifier may be the string name of a loss function or Loss class.

loss = tf.keras.losses.get("categorical_crossentropy")
type(loss)
<class 'function'>
loss = tf.keras.losses.get("CategoricalCrossentropy")
type(loss)
<class '...tensorflow.python.keras.losses.CategoricalCrossentropy'>

You can also specify config of the loss to this function by passing dict containing class_name and config as an identifier. Also note that the class_name must map to a Loss class

identifier = {"class_name": "CategoricalCrossentropy",
              "config": {"from_logits": True} }
loss = tf.keras.losses.get(identifier)
type(loss)
<class '...tensorflow.python.keras.losses.CategoricalCrossentropy'>
Arguments
identifier A loss identifier. One of None or string name of a loss function/class or loss configuration dictionary or a loss function or a loss class instance
Returns
A Keras loss as a function/ Loss class instance.
Raises
ValueError If identifier cannot be interpreted.

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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/r2.4/api_docs/python/tf/keras/losses/get