import vk_api
from vk_api import VkUpload
from vk_api.longpoll import VkLongPoll, VkEventType


def main():
    session = requests.Session()

    login, password = 'login', 'password'
    vk_session = vk_api.VkApi(login, password)

    try:
        vk_session.auth(token_only=True)
    except vk_api.AuthError as error_msg:
        print(error_msg)
        return


    vk = vk_session.get_api()

    longpoll = VkLongPoll(vk_session)

    for event in longpoll.listen():
        if event.type == VkEventType.MESSAGE_NEW and event.to_me and event.text:
            if event.text == 'Работай':
                if event.from_user:
                    vk.messages.send( #Если написали в ЛС
                        user_id=event.user_id,
                        message='какой-то текст'
                    )

                elif event.from_chat: #Если написали в беседе
                    vk.messages.send(
                        chat_id=event.chat_id,
                        message='какой-то текст'
                    )