52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Utilities for reduce operations."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import enum
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from tensorflow.python.ops import variable_scope
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from tensorflow.python.util.tf_export import tf_export
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@tf_export("distribute.ReduceOp")
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class ReduceOp(enum.Enum):
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"""Indicates how a set of values should be reduced.
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* `SUM`: Add all the values.
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* `MEAN`: Take the arithmetic mean ("average") of the values.
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"""
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# TODO(priyag): Add the following types:
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# `MIN`: Return the minimum of all values.
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# `MAX`: Return the maximum of all values.
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SUM = "SUM"
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MEAN = "MEAN"
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@staticmethod
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def from_variable_aggregation(aggregation):
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mapping = {
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variable_scope.VariableAggregation.SUM: ReduceOp.SUM,
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variable_scope.VariableAggregation.MEAN: ReduceOp.MEAN,
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}
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reduce_op = mapping.get(aggregation)
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if not reduce_op:
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raise ValueError("Could not convert from `tf.VariableAggregation` %s to"
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"`tf.distribute.ReduceOp` type" % aggregation)
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return reduce_op
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