from_users= and chats= difference in telethon

Question

I have a code and found out that:

@client.on(events.NewMessage(from_users=channels))
    async def main(event):
        print(event.message)

and

@client.on(events.NewMessage(chats=channels))
    async def main(event):
        print(event.message)

work exactly the same. What is the difference in these args then?

It has no difference so I'm interested how it works

Answer 1

The source code for Telethon is on Github and you can inspect it there. This might be what you are after:

Per: telethon/events/newmessage.py

    from_users (`entity`, optional):
        Unlike `chats`, this parameter filters the *senders* of the
        message. That is, only messages *sent by these users* will be
        handled. Use `chats` if you want private messages with this/these
        users. `from_users` lets you filter by messages sent by *one or
        more* users across the desired chats (doesn't need a list).