telebot. How to send a message to another user?

Question

Python

I recently started looking into the pytelegrambotapi library. I decided to try writing a bot that takes orders.
When the order is written, the bot sends it to the account with the chat_id, which is stored in the owner variable. There appears an inlain keyboard with an accept button. After clicking this button, a message is sent to the user who made the order. The chat_id of this user is pre-written to the user variable. But when several people use the bot at the same time, the bot remembers the last chat_id and does not send a message to the previous user. Help, please, to solve this problem.

import telebot
from telebot import types

owner=chat_id
bot=telebot.TeleBot('token')

@bot.message_handler(commands=['start'])
def start(message):
    key=types.ReplyKeyboardMarkup()
    button1=types.KeyboardButton('Меню')
    button2=types.KeyboardButton('Сделать заказ')
    key.add(button1,button2)
    bot.send_message(message.chat.id,'Привет, здесь ты можешь сделать заказ.',reply_markup=key)
    

@bot.message_handler(content_types='text')
def work(message):
    if message.text=='Меню':
        p1=types.InputMediaPhoto(open(r'1.png','rb'))
        p2=types.InputMediaPhoto(open(r'2.png','rb'))
        bot.send_media_group(message.chat.id,[p1,p2])
    elif message.text=='Сделать заказ':
        msg=bot.send_message(message.chat.id,'Напишите что вы выбрали(Одним сообщением через запятую)')
        bot.register_next_step_handler(msg,z)
    else:
        bot.send_message(message.chat.id,'Я вас не понял(')
def z(message):
    global z
    z=message.text
    msg=bot.send_message(message.chat.id,'Напишите адрес')
    bot.register_next_step_handler(msg,a)
def a(message):
    global a
    ikey=types.InlineKeyboardMarkup()
    button_yes=types.InlineKeyboardButton(text='Принят',callback_data='yes')
    ikey.row(button_yes)
    a=message.text
    e1='Заказ: '+z
    e2='Адрес: '+a
    e=e1+'\n'+e2
    bot.send_message(owner,e,reply_markup=ikey)
    bot.send_message(message.chat.id,'Я отправил ваш заказ.Пожалуйста, подождите.')
    global user
    user=message.chat.id
@bot.callback_query_handler(func=lambda call: True)
def callback_inline(call):
    if call.message:
        if call.data=='yes':
            bot.send_message(user,'Принято')        

bot.polling()

Answer 1

You recently started learning Python. And yes, programming.
Start with variable names. Not only do you have global a, z, but you also called the functions that way. You read and do not understand what the author wanted to say.
As a tip on the topic of the question - When creating an Inline (not Inlain) button for the owner user, put the user_id of the user from which the order came from in the callback_data.

button_yes=types.InlineKeyboardButton(text='Принят',callback_data=f'yes|{message.chat.id}')

And then

@bot.callback_query_handler(func=lambda call: True)
def callback_inline(call):
    answer, user = call.data.split('|')
    if answer=='yes':
        bot.send_message(user,'Принято')

Remove all global, why do you need them???
Format the code, put empty lines between the functions, it is impossible to read,
give the functions normal names, instead of single-letter a z. After some time, you will want to tweak the code and spend a couple of hours remembering what these az stand for.