1# Copyright 2022 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 used in Trackable for checkpointing and serialization.""" 16 17import enum 18 19 20# Key where the object graph proto is saved in a TensorBundle 21OBJECT_GRAPH_PROTO_KEY = "_CHECKPOINTABLE_OBJECT_GRAPH" 22 23# A key indicating a variable's value in an object's checkpointed Tensors 24# (Trackable._gather_saveables_for_checkpoint). If this is the only key and 25# the object has no dependencies, then its value may be restored on object 26# creation (avoiding double assignment when executing eagerly). 27VARIABLE_VALUE_KEY = "VARIABLE_VALUE" 28OBJECT_CONFIG_JSON_KEY = "OBJECT_CONFIG_JSON" 29 30 31@enum.unique 32class SaveType(str, enum.Enum): 33 SAVEDMODEL = "savedmodel" 34 CHECKPOINT = "checkpoint" 35