from telethon import TelegramClient

# These example values won't work. You must get your own api_id and
# api_hash from https://my.telegram.org, under API Development.
api_id = 12345
api_hash = '0123456789abcdef0123456789abcdef'
phone = '+34600000000'

client = TelegramClient('session_name', api_id, api_hash)
client.connect()

# If you already have a previous 'session_name.session' file, skip this.
client.sign_in(phone=phone)
me = client.sign_in(code=77777)  # Put whatever code you received here.

print(me.stringify())

client.send_message('username', 'Hello! Talking to you from Telethon')
client.send_file('username', '/home/myself/Pictures/holidays.jpg')

client.download_profile_photo(me)
total, messages, senders = client.get_message_history('username')
client.download_media(messages[0])