python-telegram-bot/examples/echobot.py

#!/usr/bin/env python
# pylint: disable=unused-argument
# This program is dedicated to the public domain under the CC0 license.

"""
Simple Bot to reply to Telegram messages.

First, a few handler functions are defined. Then, those functions are passed to
the Application and registered at their respective places.
Then, the bot is started and runs until we press Ctrl-C on the command line.

Usage:
Basic Echobot example, repeats messages.
Press Ctrl-C on the command line or send a signal to the process to stop the
bot.
"""

import logging

from telegram import ForceReply, Update
from telegram.ext import Application, CallbackContext, CommandHandler, MessageHandler, filters

# 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 update and
# context.
async def start(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Send a message when the command /start is issued."""
    user = update.effective_user
    await update.message.reply_html(
        fr'Hi {user.mention_html()}!',
        reply_markup=ForceReply(selective=True),
    )


async def help_command(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Send a message when the command /help is issued."""
    await update.message.reply_text('Help!')


async def echo(update: Update, context: CallbackContext.DEFAULT_TYPE) -> None:
    """Echo the user message."""
    await update.message.reply_text(update.message.text)


def main() -> None:
    """Start the bot."""
    # Create the Application and pass it your bot's token.
    application = Application.builder().token("TOKEN").build()

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

    # on non command i.e message - echo the message on Telegram
    application.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, echo))

    # Run the bot until the user presses Ctrl-C
    application.run_polling()


if __name__ == '__main__':
    main()