manyi/venv/Lib/site-packages/bidict/_exc.py

# -*- 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/.


"""Provides all bidict exceptions."""


class BidictException(Exception):
    """Base class for bidict exceptions."""


class DuplicationError(BidictException):
    """Base class for exceptions raised when uniqueness is violated
    as per the RAISE duplication policy.
    """


class KeyDuplicationError(DuplicationError):
    """Raised when a given key is not unique."""


class ValueDuplicationError(DuplicationError):
    """Raised when a given value is not unique."""


class KeyAndValueDuplicationError(KeyDuplicationError, ValueDuplicationError):
    """Raised when a given item's key and value are not unique.

    That is, its key duplicates that of another item,
    and its value duplicates that of a different other item.
    """