telegram python handle start message on bot code example

Example: message handler python telegram bot example

def echo(update, context):
    context.bot.send_message(chat_id=update.effective_chat.id, text=update.message.text)

from telegram.ext import MessageHandler, Filters
echo_handler = MessageHandler(Filters.text & (~Filters.command), echo)
dispatcher.add_handler(echo_handler)