Introduction to bot programming

main.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""Source: https://github.com/python-telegram-bot/python-telegram-bot/blob/master/examples/echobot2.py"""

from telegram.ext import Updater, CommandHandler, MessageHandler, Filters
import logging

# Enable logging
logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
                    level=logging.INFO)

logger = logging.getLogger(__name__)


# Define a few command handlers. These usually take the two arguments bot and
# update. Error handlers also receive the raised TelegramError object in error.
def start(bot, update):
    """Send a message when the command /start is issued."""
    update.message.reply_text('Hi!')

def echo(bot, update):
    """Echo the user message."""
    update.message.reply_text(update.message.text)

"""Start the bot."""
# Create the EventHandler and pass it your bot's token.
updater = Updater("TOKEN")

# Get the dispatcher to register handlers
dp = updater.dispatcher

# on different commands - answer in Telegram
dp.add_handler(CommandHandler("start", start))

# on noncommand i.e message - echo the message on Telegram
dp.add_handler(MessageHandler(Filters.text, echo))

# Start the Bot
updater.start_polling()
updater.idle()