When I try to check a variable, I get an error, what should I do?

Question

Python

When trying to check a variable, it gives the following error:

Code:

import telebot
from telebot import types
import random
import config
import time

bot = telebot.TeleBot(config.TOKEN)


@bot.message_handler(commands=['start'])
def welcome(message):
    markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
    item1 = types.KeyboardButton("случайная картинка")
    item2 = types.KeyboardButton("теги")
    markup.add(item1, item2)
    bot.send_message(message.chat.id, "добро пожаловать!\nя - бот лошара".format(message.from_user, bot.get_me()), reply_markup=markup,
    parse_mode='html')
@bot.message_handler(content_types=['text'])
def gu(message):
    if message.chat.type == 'private':
        if message.text == 'случайная картинка':
            number = str(random.randint(1, 5))
            if number == '1':
                photo = open('C:\матвей\c.jpg', 'rb')
                bot.send_photo(message.chat.id, photo)
                bot.send_message(message.chat.id, 'Лукака')
            elif number == '2':
                photo2 = open('C:\матвей\wow.jpg', 'rb')
                bot.send_photo(message.chat.id, photo2)
                bot.send_message(message.chat.id, 'уха')
            elif number == '3':
                photo3 = open('C:\матвей\gori.jpg', 'rb')
                bot.send_photo(message.chat.id, photo3)
                bot.send_message(message.chat.id, 'gorrilaz')
            elif number == '4':
                photo4 = open('C:\матвей\phototest.jpg', 'rb')
                bot.send_photo(message.chat.id, photo4)
                bot.send_message(message.chat.id, 'Мой рисунок')
            elif number == '5':
                photo5 = open('C:\матвей\onime.png', 'rb')
                bot.send_photo(message.chat.id, photo5)
                bot.send_message(message.chat.id, 'Аниме женщина')
        elif message.text == 'теги':
            markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
            item1 = types.KeyboardButton("европа")
            item2 = types.KeyboardButton("азия")
            item3 = types.KeyboardButton("америка")
            item4 = types.KeyboardButton("росcия")
            item5 = types.KeyboardButton("япония")
            item6 = types.KeyboardButton("беларусь")
            item7 = types.KeyboardButton("сша")
            item8 = types.KeyboardButton("франция")
            item9 = types.KeyboardButton("великобритания")
            markup.add(item1, item2, item3, item4, item5, item6, item7, item8, item9)
            bot.send_message(message.chat.id, 'теги', reply_markup=markup)
        elif message.text == 'европа':
            number = str(random.randint(1, 4))
            markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
            item1 = types.KeyboardButton("случайная картинка")
            item2 = types.KeyboardButton("теги")
            item3 = types.KeyboardButton('подробности')
            markup.add(item1, item2, item3)
            if number == '1':
                country = '1'
                photo1 = open('C:\матвей\moscow.jpg', 'rb')
                bot.send_photo(message.chat.id, photo1, reply_markup=markup)
            elif number == '2':
                country = '7'
                photo2 = open('C:\матвей\paris.jpg', 'rb')
                bot.send_photo(message.chat.id, photo2, reply_markup=markup)
            elif number == '3':
                country = '8'
                photo3 = open('C:\матвей\london.jpg', 'rb')
                bot.send_photo(message.chat.id, photo3, reply_markup=markup)
            elif number == '4':
                country = '4'
                photo4 = open('C:\матвей\minsk.jpg', 'rb')
                bot.send_photo(message.chat.id, photo4, reply_markup=markup, dog='4')
        elif message.text == 'россия':
             country = '1'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\moscow.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'азия':
             country = '2'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\pokyo.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'япония':
             country = '3'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\pokyo.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'беларусь':
             country = '4'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\minsk.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'америка':
             country = '5'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\pew_york.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'сша':
             country = '6'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\pew_york.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'франция':
             country = '7'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\paris.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        elif message.text == 'великобритания ':
             country = '8'
             markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
             item1 = types.KeyboardButton("случайная картинка")
             item2 = types.KeyboardButton("теги")
             item3 = types.KeyboardButton('подробности')
             markup.add(item1, item2, item3)
             photo = open('C:\матвей\london.jpg', 'rb')
             bot.send_photo(message.chat.id, photo, reply_markup=markup)
        if message.text == 'подробности':
            if country == '1':
                bot.send_message(message.chat.id, 'Москва')
            elif country == '2':
                bot.send_message(message.chat.id, 'Токио')
            elif country == '3':
                bot.send_message(message.chat.id, 'Токио')
            elif country == '4':
                bot.send_message(message.chat.id, 'Минск')
            elif country == '5':
                bot.send_message(message.chat.id, 'Нью-Уорк')
            elif country == '6':
                bot.send_message(message.chat.id, 'Нью-Уорк')
            elif country == '7':
                bot.send_message(message.chat.id, 'Париж')
            elif country == '8':
                bot.send_message(message.chat.id, 'Лондон')

if __name__ == '__main__':
    while True:
        try:
            bot.polling(none_stop=True)
        except Exception as e:
            time.sleep(3)
            print(e)

Answer 1

I have not seen anywhere that the country variable is global. The value is immediately lost after the function ends.
Secondly, a global variable can only carry a value for the last user.
Therefore, the variable must be bound to the user.

Answer 2

To you, in black and white in the text of the error, it is written that the country variable is used before the declaration. That is, in the program you have never assigned anything to it, but you are already trying to check its value. Of course there is a mistake.
It even shows which line. What to do? Fix.