'NoneType' object is not subscriptable can't figure out why?

Question

Python

'NoneType' object is not subscriptable after execution

Here is the function from the bot

def del_cat(message):
        try:
            conn = sqlite3.connect("base_ts.sqlite")
            cursor = conn.cursor()
            cursor.execute('SELECT * FROM catalog')
            row = cursor.fetchall()
            cursor.close()
            conn.close()

            name = row[int(message.text)][1]
            category = func.AddCategory(name)
            cat_dict[message.chat.id] = category

            conn = sqlite3.connect("base_ts.sqlite")
            cursor = conn.cursor()
            cursor.execute(f'SELECT * FROM "{name}"')
            row = cursor.fetchall()
            cursor.close()
            conn.close()

            text = ''
            num = 0

            for i in row:
                text = text + '№ ' + str(num) + '   |  ' + str(i[0]) + '\n'
                num += 1

            msg = bot.send_message(chat_id=message.chat.id,
                                   text='Выберите номер товара который хотите удалить\n\n'
                                        f'{text}')
            bot.register_next_step_handler(msg, del_cat_2)
        except Exception as e:
            print(e)
            bot.send_message(chat_id=message.chat.id,
                             text='Упсс, что-то пошло не по плану')

    def del_cat_2(message):
        try:
            category = cat_dict[message.chat.id]

            conn = sqlite3.connect("base_ts.sqlite")
            cursor = conn.cursor()
            cursor.execute(f"SELECT * FROM '{category.section}'")
            row = cursor.fetchall()

            name_category = row[int(message.text)][2]
            category.category = name_category

            markup = types.ReplyKeyboardMarkup(one_time_keyboard=True, resize_keyboard=True)
            markup.add('Yes', 'No')

            msg = bot.send_message(chat_id=message.chat.id,
                                   text='❕Удалить ⬇️\n'
                                        f'❕{category.category}\n\n'
                                        '❕из раздела ⬇️\n'
                                        f'❕{category.section}  ?',
                                   reply_markup=markup)
            bot.register_next_step_handler(msg, del_cat_3)
        except Exception as e:
            print(e)
            bot.send_message(chat_id=message.chat.id,
                             text='Упсс, что-то пошло не по плану')

    def del_cat_3(message):
        try:
            if message.text == 'Yes':
                category = cat_dict[message.chat.id]

                func.del_cat_to_section(category.category, category.section)
                bot.send_message(
                    chat_id=message.chat.id,
                    text=f'✅Товар: {category.category}\n'
                         f'✅Успешно удален из раздела',
                    reply_markup=menu.admin_menu
                )
            if message.text == 'No':
                bot.send_message(chat_id=message.chat.id,
                                 text='Вы вернулись в меню админа',
                                 reply_markup=menu.admin_menu)
        except Exception as e:
                print(e)
                bot.send_message(chat_id=message.chat.id,
                                 text='Упсс3, что-то пошло не по плану')

This is from importing the file as a function, I suspect that the problem is in the classes, but how will it be true

class AddCategory:
    def __init__(self, section):
        self.section = section
        self.cat = None
        self.category = None

class Category:
    def __init__(self, category):
        self.category = category

def del_cat_to_section(section, name_category):
    # Connection
    conn = sqlite3.connect("base_ts.sqlite")
    cursor = conn.cursor()

    # del
    category = cursor.execute(f'SELECT * FROM "{section}" WHERE list = "{name_category}"').fetchone()

    cursor.execute(f"DELETE FROM '{section}' WHERE list = '{name_category}'")
    conn.commit()

    cursor.execute(f"DROP TABLE '{category[2]}'")

    # Close connection
    cursor.close()
    conn.close()

I get to the 3rd divider and
'NoneType' object is not subscriptable

Answer 1

Stop doing that, learn the basics of relational databases. You don't need to create/delete tables for each category, you need to use links (relationships) between tables.
ZY well and standard, full traceback of an error is necessary.