1) Получить название беседы: title = vk_api.method("messages.getChat", {"chat_id": event.chat_id})["title"]
2) while True:
for event in longpoll.listen():
if event.type == VkEventType.MESSAGE_NEW:
title = vk.method("messages.getChat", {"chat_id": event.chat_id})["title"]
elif event.type == VkEventType.CHAT_UPDATE:
if event.update_type == VkChatEventType.TITLE:
title1 = vk.method("messages.getChat", {"chat_id": event.chat_id})["title"]
if title != title1:
vk.method("messages.editChat", {"chat_id": event.chat_id, "title": title})
