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# Pyrogram - Telegram MTProto API Client Library for Python

# This file is part of Pyrogram.

# Pyrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# Pyrogram 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 General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License

# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.

from typing import Union

import pyrogram

from pyrogram import raw

class SetChatDescription:

async def set_chat_description(

self: "pyrogram.Client",

chat_id: Union[int, str],

description: str

) -> bool:

"""Change the description of a supergroup or a channel.

You must be an administrator in the chat for this to work and must have the appropriate admin rights.

.. include:: /_includes/usable-by/users-bots.rst

Parameters:

chat_id (``int`` | ``str``):

Unique identifier (int) or username (str) of the target chat.

description (``str``):

New chat description, 0-255 characters.

Returns:

``bool``: True on success.

Raises:

ValueError: if a chat_id doesn't belong to a supergroup or a channel.

Example:

.. code-block:: python

await app.set_chat_description(chat_id, "New Description")

"""

peer = await self.resolve_peer(chat_id)

if isinstance(peer, (raw.types.InputPeerChannel, raw.types.InputPeerChat)):

await self.invoke(

raw.functions.messages.EditChatAbout(

peer=peer,

about=description

)

else:

raise ValueError(f'The chat_id "{chat_id}" belongs to a user')

return True

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