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1# Copyright 2019 The TensorFlow Authors. All Rights Reserved. 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# http://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14# ============================================================================== 

15"""Constants for Keras SavedModel serialization.""" 

16 

17# Namespace used to store all attributes added during serialization. 

18# e.g. the list of layers can be accessed using `loaded.keras_api.layers`, in an 

19# object loaded from `tf.saved_model.load()`. 

20KERAS_ATTR = 'keras_api' 

21 

22# Keys for the serialization cache. 

23# Maps to the keras serialization dict {Layer --> SerializedAttributes object} 

24KERAS_CACHE_KEY = 'keras_serialized_attributes' 

25 

26 

27# Name of Keras metadata file stored in the SavedModel. 

28SAVED_METADATA_PATH = 'keras_metadata.pb' 

29 

30# Names of SavedObject Keras identifiers. 

31INPUT_LAYER_IDENTIFIER = '_tf_keras_input_layer' 

32LAYER_IDENTIFIER = '_tf_keras_layer' 

33METRIC_IDENTIFIER = '_tf_keras_metric' 

34MODEL_IDENTIFIER = '_tf_keras_model' 

35NETWORK_IDENTIFIER = '_tf_keras_network' 

36RNN_LAYER_IDENTIFIER = '_tf_keras_rnn_layer' 

37SEQUENTIAL_IDENTIFIER = '_tf_keras_sequential' 

38 

39KERAS_OBJECT_IDENTIFIERS = ( 

40 INPUT_LAYER_IDENTIFIER, 

41 LAYER_IDENTIFIER, 

42 METRIC_IDENTIFIER, 

43 MODEL_IDENTIFIER, 

44 NETWORK_IDENTIFIER, 

45 RNN_LAYER_IDENTIFIER, 

46 SEQUENTIAL_IDENTIFIER, 

47)