obtain arg from private messages discord.py code example

Example 1: discord.py

import discord

client = discord.Client()

@client.event
async def on_ready():
    print('We have logged in as {0.user}'.format(client))

@client.event
async def on_message(message):
    if message.author == client.user:
        return

    if message.content.startswith('$hello'):
        await message.channel.send('Hello!')

client.run('your token here')

Example 2: discord py fetch channel by id

channel = discord.utils.get(ctx.guild.channels, name=given_name)
channel_id = channel.id