bot.py

import os
from telegram import Update
from telegram.ext import ApplicationBuilder, CommandHandler, MessageHandler, filters, ContextTypes

# Replace 'YOUR_BOT_TOKEN' with your actual bot token from BotFather
TOKEN = os.getenv('TELEGRAM_BOT_TOKEN', 'YOUR_BOT_TOKEN')

async def start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await update.message.reply_text('Hello! I am your Telegram bot. Send me a message!')

async def echo(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await update.message.reply_text(update.message.text)

async def help_command(update: Update, context: ContextTypes.DEFAULT_TYPE):
    await update.message.reply_text('Available commands:\n/start - Start the bot\n/help - Get help')

def main():
    application = ApplicationBuilder().token(TOKEN).build()

    application.add_handler(CommandHandler("start", start))
    application.add_handler(CommandHandler("help", help_command))
    application.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, echo))

    application.run_polling()

if __name__ == '__main__':
    main()