49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
# Copyright 2025 The JAX Authors.
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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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# https://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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from typing import Any, Iterator, Mapping, TypeVar
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K = TypeVar("K")
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V = TypeVar("V")
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class FrozenDict(Mapping[K, V]):
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def __init__(self, d: Mapping[K, V]):
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self._d = dict(d.items())
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def __repr__(self) -> str:
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return f"FrozenDict({self._d!r})"
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def __str__(self) -> str:
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return f"FrozenDict({self._d})"
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def __getitem__(self, key: K) -> V:
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return self._d[key]
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def __hash__(self) -> int:
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# This assumes that the values are hashable.
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return hash(frozenset(self._d.items()))
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def __eq__(self, other: Any) -> bool:
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if not isinstance(other, FrozenDict):
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return False
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return self._d == other._d
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def __iter__(self) -> Iterator[K]:
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return iter(self._d)
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def __len__(self) -> int:
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return len(self._d)
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