vk_session = vk_api.VkApi(token=group_token)
 longpoll = VkBotLongPoll(vk_session, group_id)
 upload = vk_api.VkUpload(vk_session)
 
 for event in longpoll.listen():
 if event.type == VkBotEventType.MESSAGE_NEW:
 print(event)
 print(event.obj)
 print(event.obj.message)
 print('new message:')
 print('by: ', end='')
 print(event.obj.message["from_id"])
 
 print(text:', event.obj.message["text"])
 # для примера, пытаемся загрузить файл, который был указан в сообщении, используя текст как путь
 document = upload.document_message(event.obj.message["text"], peer_id=event.obj.message["peer_id"])
 print(document)

Traceback (most recent call last):
 File "/home/gravitos/Projects/..././bot.py", line 64, in <module>
 main()
 ~~~~^^
 File "/home/gravitos/Projects/..././bot.py", line 48, in main
 document = upload.document_message(event.obj.message["text"], peer_id=event.obj.message["peer_id"])
 File "/home/gravitos/Projects/.../lib/python3.13/site-packages/vk_api/upload.py", line 460, in document_message
 return self.document(doc, title, tags, message_peer_id=peer_id)
 ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/home/gravitos/Projects/.../lib/python3.13/site-packages/vk_api/upload.py", line 436, in document
 return self.vk.docs.save(**response)
 ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
 File "/home/gravitos/Projects/.../lib/python3.13/site-packages/vk_api/vk_api.py", line 1043, in __call__
 return self._vk.method(self._method, kwargs)
 ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
 File "/home/gravitos/Projects/.../lib/python3.13/site-packages/vk_api/vk_api.py", line 934, in method
 raise error
vk_api.exceptions.ApiError: [100] One of the parameters specified was missing or invalid: file is undefined