Исправлен вывод имени пользователей TG без фамилии.

tg/handlers/admin.py

@@ -95,9 +95,9 @@ async def warning_handler(message: Message, bot: Bot):
     user = database.DB.get_user(chat_id, user_id)
 
     user_info = message.reply_to_message.from_user
-    await message.answer('У {} {} {} {}.'.format(
-        user_info.first_name,
-        user_info.last_name,
+    # TODO: родительный падеж имени и фамилии, если возможно
+    await message.answer('У {} {} {}.'.format(
+        utils.full_name(user_info.first_name, user_info.last_name),
         user['warnings'],
         utils.make_word_agree_with_number(user['warnings'], 'предупреждение'))
     )

tg/handlers/user.py

@@ -4,6 +4,7 @@ from aiogram import Bot, Router, F
 from aiogram.types import Message
 from aiogram.utils.formatting import Bold, Italic
 
+import utils
 from messages import *
 import tg.tg_database as database
 
@@ -16,7 +17,7 @@ async def format_rating(chat_id: int, top_users: List[Any], bot: Bot) -> str:
     i = 1
     for user in top_users:
         info = await bot.get_chat_member(chat_id, user['user_id'])
-        result += '{}. {} {} - {}\n'.format(i, info.user.first_name, info.user.last_name, user['value'])
+        result += '{}. {} - {}\n'.format(i, utils.full_name(info.user.first_name, info.user.last_name), user['value'])
         i = i + 1
 
     return result

utils.py

@@ -1,4 +1,6 @@
 from calendar import timegm
+from typing import Optional
+
 from pymorphy3 import MorphAnalyzer
 from time import gmtime
 
@@ -13,3 +15,9 @@ def make_word_agree_with_number(n: int, word: str) -> str:
 
 def posix_time():
     return timegm(gmtime())
+
+
+def full_name(first_name: str, last_name: Optional[str]) -> str:
+    if last_name is not None:
+        return f"{first_name} {last_name}"
+    return first_name