#!/usr/bin/env python

#

# A library that provides a Python interface to the Telegram Bot API

# Copyright (C) 2015-2026

# 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/].

import inspect

def mro_slots(obj, only_parents: bool = False):

"""Returns a list of all slots of a class and its parents.

Args:

obj (:obj:`type`): The class or class-instance to get the slots from.

only_parents (:obj:`bool`, optional): If ``True``, only the slots of the parents are

returned. Defaults to ``False``.

"""

cls = obj if inspect.isclass(obj) else obj.__class__

classes = cls.__mro__[1:] if only_parents else cls.__mro__

return [

attr

for cls in classes

if hasattr(cls, "__slots__") # The Exception class doesn't have slots

for attr in cls.__slots__

]