bot.py

from telegram import __version__ as TG_VER

try:
    from telegram import __version_info__
except ImportError:
    __version_info__ = (0, 0, 0, 0, 0)  # type: ignore[assignment]

if __version_info__ < (20, 0, 0, "alpha", 1):
    raise RuntimeError(
        f"This example is not compatible with your current PTB version {TG_VER}. To view the "
        f"{TG_VER} version of this example, "
        f"visit https://docs.python-telegram-bot.org/en/v{TG_VER}/examples.html"
    )
from telegram import ForceReply, Update
from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters





# 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_html(
        rf"Hi {user.mention_html()}!, I'm a bot created by Didis_01. Nice to meet you! To view the commands use /help.",
        reply_markup=ForceReply(selective=True),
    )


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("Here you have the commands:\n/add -> It saves whatever you put to a variable.\n/list -> It shows all the incredible things you have saved. \n/delete -> It deletes the list.")


async def echo(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_text("I don't know what you mean :/,\n use /help to view the command list :D")

                                                 
async def add_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    x=update.message.text.replace("/add " ,"",1)
    if(x=="/add"):
        await update.message.reply_text("Nothing was added to the list")
    else:
        print(x)
        y=x+" was added to the list!"
        await update.message.reply_text(y)
        archivo = open('log.txt', 'r')
        z = archivo.read()
        archivo.close()
        archivo = open('log.txt', 'w')
        archivo.write(z + '\n' + x )
        archivo.close()


async def list_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    archivo = open('log.txt', 'r')
    z = archivo.read()
    archivo.close()
    y="You have this in the list:\n" + z
    print(y)
    await update.message.reply_text(y)

async def delete_command(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    archivo = open('log.txt', 'w')
    archivo.write("")
    archivo.close()
    y="The list was deleted :/"
    print(y)
    await update.message.reply_text(y)




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

    # on different commands - answer in Telegram
    application.add_handler(CommandHandler("start", start))
    application.add_handler(CommandHandler("help", help_command))
    application.add_handler(CommandHandler("add", add_command))
    application.add_handler(CommandHandler("list", list_command))
    application.add_handler(CommandHandler("delete", delete_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()