79 lines
2.3 KiB
Python
79 lines
2.3 KiB
Python
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# 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 serializing Python objects."""
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import numpy as np
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import wrapt
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from tensorflow.python.framework import dtypes
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from tensorflow.python.framework import tensor_shape
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from tensorflow.python.util.compat import collections_abc
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def get_json_type(obj):
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"""Serializes any object to a JSON-serializable structure.
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Args:
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obj: the object to serialize
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Returns:
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JSON-serializable structure representing `obj`.
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Raises:
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TypeError: if `obj` cannot be serialized.
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"""
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# if obj is a serializable Keras class instance
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# e.g. optimizer, layer
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if hasattr(obj, 'get_config'):
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return {'class_name': obj.__class__.__name__, 'config': obj.get_config()}
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# if obj is any numpy type
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if type(obj).__module__ == np.__name__:
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if isinstance(obj, np.ndarray):
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return obj.tolist()
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else:
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return obj.item()
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# misc functions (e.g. loss function)
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if callable(obj):
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return obj.__name__
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# if obj is a python 'type'
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if type(obj).__name__ == type.__name__:
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return obj.__name__
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if isinstance(obj, tensor_shape.Dimension):
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return obj.value
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if isinstance(obj, tensor_shape.TensorShape):
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return obj.as_list()
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if isinstance(obj, dtypes.DType):
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return obj.name
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if isinstance(obj, collections_abc.Mapping):
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return dict(obj)
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if obj is Ellipsis:
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return {'class_name': '__ellipsis__'}
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if isinstance(obj, wrapt.ObjectProxy):
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return obj.__wrapped__
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raise TypeError(f'Object {obj} is not JSON-serializable. You may implement '
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'a `get_config()` method on the class '
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'(returning a JSON-serializable dictionary) to make it '
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'serializable.')
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