How to get the participant id via reply?

Question

Python

I need to find out the id of the participant through a command, that is, I write a command to someone in response, for example /idu, and the bot sends the id of the participant to whom I answer.
I saw this post on Habré: Need to find out the user id via reply pytelegrambotapi?
but he didn't help me much

Answer 1

Print message and find out what's in it.

@bot.message_handler(commands=['idu'])
def userid(message):
    print(message.reply_to_message.from_user.id)