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bazarr/libs/bidict/_dup.py

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Python

# Copyright 2009-2024 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/.
"""Provide :class:`OnDup` and related functionality."""
from __future__ import annotations
import typing as t
from enum import Enum
class OnDupAction(Enum):
"""An action to take to prevent duplication from occurring."""
#: Raise a :class:`~bidict.DuplicationError`.
RAISE = 'RAISE'
#: Overwrite existing items with new items.
DROP_OLD = 'DROP_OLD'
#: Keep existing items and drop new items.
DROP_NEW = 'DROP_NEW'
def __repr__(self) -> str:
return f'{self.__class__.__name__}.{self.name}'
RAISE: t.Final[OnDupAction] = OnDupAction.RAISE
DROP_OLD: t.Final[OnDupAction] = OnDupAction.DROP_OLD
DROP_NEW: t.Final[OnDupAction] = OnDupAction.DROP_NEW
class OnDup(t.NamedTuple):
r"""A combination of :class:`~bidict.OnDupAction`\s specifying how to handle various types of duplication.
The :attr:`~OnDup.key` field specifies what action to take when a duplicate key is encountered.
The :attr:`~OnDup.val` field specifies what action to take when a duplicate value is encountered.
In the case of both key and value duplication across two different items,
only :attr:`~OnDup.val` is used.
*See also* :ref:`basic-usage:Values Must Be Unique`
(https://bidict.rtfd.io/basic-usage.html#values-must-be-unique)
"""
key: OnDupAction = DROP_OLD
val: OnDupAction = RAISE
#: Default :class:`OnDup` used for the
#: :meth:`~bidict.bidict.__init__`,
#: :meth:`~bidict.bidict.__setitem__`, and
#: :meth:`~bidict.bidict.update` methods.
ON_DUP_DEFAULT: t.Final[OnDup] = OnDup(key=DROP_OLD, val=RAISE)
#: An :class:`OnDup` whose members are all :obj:`RAISE`.
ON_DUP_RAISE: t.Final[OnDup] = OnDup(key=RAISE, val=RAISE)
#: An :class:`OnDup` whose members are all :obj:`DROP_OLD`.
ON_DUP_DROP_OLD: t.Final[OnDup] = OnDup(key=DROP_OLD, val=DROP_OLD)