text: # Copyright 2018, The TensorFlow Federated Authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  """Libraries for running Federated Learning simulations."""
  
  from tensorflow_federated.python.simulation import datasets
  from tensorflow_federated.python.simulation import models
  from tensorflow_federated.python.simulation.checkpoint_manager import FileCheckpointManager
  from tensorflow_federated.python.simulation.csv_manager import CSVMetricsManager
  from tensorflow_federated.python.simulation.iterative_process_compositions import compose_dataset_computation_with_computation
  from tensorflow_federated.python.simulation.iterative_process_compositions import compose_dataset_computation_with_iterative_process
  from tensorflow_federated.python.simulation.metrics_manager import MetricsManager
  from tensorflow_federated.python.simulation.sampling_utils import build_uniform_client_sampling_fn
  from tensorflow_federated.python.simulation.sampling_utils import build_uniform_sampling_fn
  from tensorflow_federated.python.simulation.server_utils import run_server
  from tensorflow_federated.python.simulation.server_utils import server_context
  from tensorflow_federated.python.simulation.tensorboard_manager import TensorBoardManager
  from tensorflow_federated.python.simulation.training_loop import run_simulation
  from tensorflow_federated.python.simulation.training_loop import run_simulation_with_callbacks
  from tensorflow_federated.python.simulation.training_loop import TRAIN_STEP_TIME_KEY
  from tensorflow_federated.python.simulation.training_loop import TRAIN_STEPS_PER_HOUR_KEY
  from tensorflow_federated.python.simulation.training_loop import VALIDATION_METRICS_PREFIX
  from tensorflow_federated.python.simulation.training_loop import VALIDATION_TIME_KEY
  