Done

.gitignore

@@ -356,3 +356,6 @@ dmypy.json
 # Cython debug symbols
 cython_debug/
 
+*todobot/config.py
+.idea
+

run_todobot.py

@@ -0,0 +1,4 @@
+from todobot.bot import main
+
+if __name__ == '__main__':
+    main()

todobot/bot.py

@@ -0,0 +1,71 @@
+#!/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, CommandHandler, ContextTypes, MessageHandler, filters
+from todobot.config import TELEGRAM_TOKEN
+
+# Enable logging
+logging.basicConfig(
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
+)
+# set higher logging level for httpx to avoid all GET and POST requests being logged
+logging.getLogger("httpx").setLevel(logging.WARNING)
+
+logger = logging.getLogger(__name__)
+
+
+# Define a few command handlers. These usually take the two arguments update and
+# context.
+async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Send a message when the command /start is issued."""
+    user = update.effective_user
+    await update.message.reply_text(
+        'Hello, Rust!'
+    )
+
+
+async def help_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
+    """Send a message when the command /help is issued."""
+    await update.message.reply_text("Help!")
+
+
+async def echo(update: Update, context: ContextTypes.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(TELEGRAM_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(allowed_updates=Update.ALL_TYPES)
+
+
+if __name__ == "__main__":
+    main()