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bazarr/libs/bidict/_dup.py

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1006 B

# -*- 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/.
"""Provides bidict duplication policies and the :class:`_OnDup` class."""
from collections import namedtuple
from ._marker import _Marker
_OnDup = namedtuple('_OnDup', 'key val kv')
class DuplicationPolicy(_Marker):
"""Base class for bidict's duplication policies.
*See also* :ref:`basic-usage:Values Must Be Unique`
"""
__slots__ = ()
#: Raise an exception when a duplication is encountered.
RAISE = DuplicationPolicy('DUP_POLICY.RAISE')
#: Overwrite an existing item when a duplication is encountered.
OVERWRITE = DuplicationPolicy('DUP_POLICY.OVERWRITE')
#: Keep the existing item and ignore the new item when a duplication is encountered.
IGNORE = DuplicationPolicy('DUP_POLICY.IGNORE')