Types of Handlers

A Handler is an instance derived from the base class telegram.ext.Handler which is responsible for the routing of different kinds of updates (text, audio, inlinequery, button presses, ...) to their corresponding callback function in your code.

For example, if you want your bot to respond to the command /start, you can use a CommandHandler that maps the input to a callback named my_start_callback:

def my_start_callback(bot, update):
    update.message.reply_text("Welcome to my awesome bot!")

...

dispatcher.add_handler(CommandHandler("start", my_start_callback))```