# Copyright (C) 2021 - 2026 ANSYS, Inc. and/or its affiliates.
# SPDX-License-Identifier: MIT
#
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

"""Performs some operations on Python dictionaries."""

from typing import Any


def get_first_dict_key_for_value(input_dict: dict, value: Any):
    """Get the first dictionary key that matches a value. Typical usage is where the
    value is known to be unique in the input dictionary.

    Parameters
    ----------
    input_dict : dict
    value : Any

    Returns
    -------
    Any
        Key associated with the first match.

    Raises
    ------
    ValueError
        If the value is absent from the dictionary.
    """

    try:
        return next((key for key, val in input_dict.items() if val == value))
    except StopIteration:
        raise ValueError()
