intro with telethon

telethon.py

import telethon

# lets play first with telethon

# create client
app_id = ''
app_hash = '' # you got this two from my.telegram.org

client = telethon.TelegramClient('session-name', app_id, app_hash)
client.start()
# the start method will ask for your phone number and then ask for otp
client.send_message('username', 'hello world')
# hope you already created a private channel
private_channel_url = 'your private channel url'
channel = client.get_entity(private_channel_url)
clent.send_message(channel, 'hello world from channel')