mirror of
https://github.com/python-telegram-bot/python-telegram-bot.git
synced 2024-11-25 08:37:07 +01:00
52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# A library that provides a Python interface to the Telegram Bot API
|
|
# Copyright (C) 2015-2022
|
|
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Lesser Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser Public License
|
|
# along with this program. If not, see [http://www.gnu.org/licenses/].
|
|
"""This module contains helper functions related to enums.
|
|
|
|
Warning:
|
|
Contents of this module are intended to be used internally by the library and *not* by the
|
|
user. Changes to this module are not considered breaking changes and may not be documented in
|
|
the changelog.
|
|
"""
|
|
from enum import Enum
|
|
from typing import Type, TypeVar, Union
|
|
|
|
_A = TypeVar("_A")
|
|
_B = TypeVar("_B")
|
|
_Enum = TypeVar("_Enum", bound=Enum)
|
|
|
|
|
|
def get_member(enum: Type[_Enum], value: _A, default: _B) -> Union[_Enum, _A, _B]:
|
|
"""Tries to call ``enum(value)`` to convert the value into an enumeration member.
|
|
If that fails, the ``default`` is returned.
|
|
"""
|
|
try:
|
|
return enum(value)
|
|
except ValueError:
|
|
return default
|
|
|
|
|
|
class StringEnum(str, Enum):
|
|
"""Helper class for string enums where the value is not important to be displayed on
|
|
stringification.
|
|
"""
|
|
|
|
__slots__ = ()
|
|
|
|
def __repr__(self) -> str:
|
|
return f"<{self.__class__.__name__}.{self.name}>"
|