GetMessageReadParticipantsRequest
Both users and bots may be able to use this method. See code examples.
---functions--- messages.getMessageReadParticipants#2c6f97b7 peer:InputPeer msg_id:int = Vector<long>
Returns
A list of the following type is returned.
| long | 
This type has no instances available.
Parameters
| peer | InputPeer | Anything entity-like will work if the library can find its Input version (e.g., usernames, Peer, User or Channel objects, etc.). | 
| msg_id | int | 
Known RPC errors
This request can't cause any RPC error as far as we know.
Example
from telethon.sync import TelegramClient
from telethon import functions, types
with TelegramClient(name, api_id, api_hash) as client:
    result = client(functions.messages.GetMessageReadParticipantsRequest(
        peer='username',
        msg_id=42
    ))
    for x in result:
        print(x)