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- # -*- coding: utf-8 -*-
- # Copyright 2018 Joshua Bronson. All Rights Reserved.
- #
- # This Source Code Form is subject to the terms of the Mozilla Public
- # License, v. 2.0. If a copy of the MPL was not distributed with this
- # file, You can obtain one at http://mozilla.org/MPL/2.0/.
- #==============================================================================
- # * Welcome to the bidict source code *
- #==============================================================================
- # Doing a code review? You'll find a "Code review nav" comment like the one
- # below at the top and bottom of the most important source files. This provides
- # a suggested initial path through the source when reviewing.
- #
- # Note: If you aren't reading this on https://github.com/jab/bidict, you may be
- # viewing an outdated version of the code. Please head to GitHub to review the
- # latest version, which contains important improvements over older versions.
- #
- # Thank you for reading and for any feedback you provide.
- # * Code review nav *
- #==============================================================================
- # ← Prev: _base.py Current: _frozenbidict.py Next: _mut.py →
- #==============================================================================
- """Provides :class:`frozenbidict`, an immutable, hashable bidirectional mapping type."""
- from ._base import BidictBase
- from ._proxied import _ProxiedKeysValsItems
- from .compat import ItemsView
- class frozenbidict(_ProxiedKeysValsItems, BidictBase): # noqa: N801; pylint: disable=invalid-name
- """Immutable, hashable bidict type."""
- __slots__ = ()
- def __hash__(self): # lgtm [py/equals-hash-mismatch]
- """The hash of this bidict as determined by its items."""
- if getattr(self, '_hash', None) is None:
- # pylint: disable=protected-access,attribute-defined-outside-init
- self._hash = ItemsView(self)._hash()
- return self._hash
- # * Code review nav *
- #==============================================================================
- # ← Prev: _base.py Current: _frozenbidict.py Next: _mut.py →
- #==============================================================================
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