# -*- coding: utf-8 -*-
# Copyright 2009-2019 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/.


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"""Provides :class:`bidict`."""

from ._mut import MutableBidict
from ._delegating_mixins import _DelegateKeysAndItemsToFwdm


class bidict(_DelegateKeysAndItemsToFwdm, MutableBidict):  # noqa: N801,E501; pylint: disable=invalid-name
    """Base class for mutable bidirectional mappings."""

    __slots__ = ()

    __hash__ = None  # since this class is mutable; explicit > implicit.


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