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data.py
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data.py
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# Copyright 2021, 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.
"""The TFF data construct."""
from tensorflow_federated.python.common_libs import py_typecheck
from tensorflow_federated.python.core.impl.compiler import building_blocks
from tensorflow_federated.python.core.impl.federated_context import value_impl
from tensorflow_federated.python.core.impl.types import computation_types
def data(uri: str, type_spec: computation_types.Type):
"""Constructs a TFF `data` computation with the given URI and TFF type.
Args:
uri: A string (`str`) URI of the data.
type_spec: An instance of `tff.Type` that represents the type of this data.
Returns:
A representation of the data with the given URI and TFF type in the body of
a federated computation.
Raises:
TypeError: If the arguments are not of the types specified above.
"""
py_typecheck.check_type(uri, str)
type_spec = computation_types.to_type(type_spec)
return value_impl.to_value(building_blocks.Data(uri, type_spec), type_spec)