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27 lines
936 B
27 lines
936 B
# Copyright (C) 2015 The Android Open Source Project
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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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class ImmutableDict(dict):
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def __setitem__(self, key, value):
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raise RuntimeError("Cannot modify ImmutableDict")
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def __delitem__(self, key):
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raise RuntimeError("Cannot modify ImmutableDict")
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def copy_with(self, key, value):
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new_dict = ImmutableDict(self)
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dict.__setitem__(new_dict, key, value)
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return new_dict
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