36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
# Copyright (c) 2016 OpenStack Foundation.
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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
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# 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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class Sentinel(object):
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"""A constant object that does not change even when copied."""
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def __deepcopy__(self, memo):
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# Always return the same object because this is essentially a constant.
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return self
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def __copy__(self):
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# called via copy.copy(x)
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return self
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ATTR_NOT_SPECIFIED = Sentinel()
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ATTRIBUTES_TO_UPDATE = 'attributes_to_update'
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ACTION_MAP = {'POST': 'create',
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'PUT': 'update',
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'GET': 'get',
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'DELETE': 'delete'}
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