aiogram_regexp_commands_filter.py

from aiogram import Bot, types
from aiogram.dispatcher import Dispatcher, filters
from aiogram.utils import executor
import re

class RegexpCommandsFilter(filters.AsyncFilter):
    """
    Check commands by regexp in message
    """

    def __init__(self, regexp_commands):
        self.regexp_commands = [re.compile(command, flags=re.IGNORECASE | re.MULTILINE) for command in regexp_commands]

    async def check(self, message):
        if not message.is_command():
            return False

        command = message.text.split()[0][1:]
        command, _, mention = command.partition('@')

        if mention and mention != (await message.bot.me).username:
            return False

        for command in self.regexp_commands:
            search = command.search(message.text)
            if search:
                message.conf['regexp_command'] = search
                return True
        return False


@dp.message_handler(RegexpCommandsFilter(regexp_commands=['item_([0-9]*)']))
async def send_welcome(message: types.Message):
    regexp_command = message.conf['regexp_command']
    await message.reply("You have requested an item with number: {}".format(regexp_command.group(1)))