How to get a user's nickname on the server using a Python discord bot?

Question

Python

import discord

client = discord.Client()
@client.event
    if message.content.startswith('!имя') :
        caller = message.author
        caller = str(caller)
        await message.channel.send(caller)

This program takes the sender's nickname in the discord, but I need it to take the user's nickname on this server, how to implement this?

Answer 1

If the message was written in private, and not in the channel, then nothing. Because privates work past the server and are not connected with it in any way. If in a channel, then message.author.nick will return the nickname on that server.
The bot can sort through its servers for the presence of this user on them to identify it, but since the bot with the user can have more than one common server, this idea is so-so.