Почему TypeError?

Question

[RelixAgent]

Ошибка в этой строчке:
if comment in str(req['data'][i]['comment']):
Почему так?

Traceback:
File "C:\Users\VIT\AppData\Local\Programs\Python\Python310\lib\site-packages\aiogram\dispatcher\dispatcher.py", line 415, in _process_polling_updates
for responses in itertools.chain.from_iterable(await self.process_updates(updates, fast)):
File "C:\Users\VIT\AppData\Local\Programs\Python\Python310\lib\site-packages\aiogram\dispatcher\dispatcher.py", line 235, in process_updates
return await asyncio.gather(*tasks)
File "C:\Users\VIT\AppData\Local\Programs\Python\Python310\lib\site-packages\aiogram\dispatcher\handler.py", line 116, in notify
response = await handler_obj.handler(*args, **partial_data)
File "C:\Users\VIT\AppData\Local\Programs\Python\Python310\lib\site-packages\aiogram\dispatcher\dispatcher.py", line 283, in process_update
return await self.callback_query_handlers.notify(update.callback_query)
File "C:\Users\VIT\AppData\Local\Programs\Python\Python310\lib\site-packages\aiogram\dispatcher\handler.py", line 116, in notify
response = await handler_obj.handler(*args, **partial_data)
File "c:\Users\VIT\Desktop\патриот\main.py", line 365, in check
if comment in str(req['data'][i]['comment']):
TypeError: 'in ' requires string as left operand, not NoneType

Answer 1

[RelixAgent]

Самоответ:
Переменную comment надо сделать строкой