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from_tensor_slices_client_data.py
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from_tensor_slices_client_data.py
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# Lint as: python3
# Copyright 2019, 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.
"""A simple ClientData based on in-memory tensor slices."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import tensorflow as tf
from tensorflow_federated.python.common_libs import py_typecheck
from tensorflow_federated.python.simulation import client_data
class FromTensorSlicesClientData(client_data.ClientData):
"""ClientData based on `tf.data.Dataset.from_tensor_slices`."""
def __init__(self, tensor_slices_dict):
"""Constructs the object from a dictionary of client data.
NOTE: All clients are required to have non-empty data.
Args:
tensor_slices_dict: A dictionary keyed by client_id, where values are
structures suitable for passing to `tf.data.Dataset.from_tensor_slices`.
Raises:
ValueError: If a client with no data is found.
"""
py_typecheck.check_type(tensor_slices_dict, dict)
self._tensor_slices_dict = tensor_slices_dict
example_dataset = self.create_tf_dataset_for_client(self.client_ids[0])
self._output_types = tf.compat.v1.data.get_output_types(example_dataset)
self._output_shapes = tf.compat.v1.data.get_output_shapes(example_dataset)
@property
def client_ids(self):
return list(self._tensor_slices_dict.keys())
def create_tf_dataset_for_client(self, client_id):
tensor_slices = self._tensor_slices_dict[client_id]
if tensor_slices:
return tf.data.Dataset.from_tensor_slices(tensor_slices)
else:
raise ValueError('No data found for client {}'.format(client_id))
@property
def output_types(self):
return self._output_types
@property
def output_shapes(self):
return self._output_shapes