https://www.tensorflow.org/versions/r2.7/api_docs/python/tf/keras/optimizers/schedules/PiecewiseConstantDecay
tf.keras.optimizers.schedules.PiecewiseConstantDecay | TensorFlow v2.7.4
A LearningRateSchedule that uses a piecewise constant decay schedule.
tfkerasoptimizersschedulestensorflow