ImportError: cannot import name 'with_slots' from 'dataslots'

[grummble-ai]

Was about to tinker with this library but minimal code example from docs

import pobapi

url = "https://pastebin.com/9rxrrdjE"

build = pobapi.from_url(url)

yields the following error:

Traceback (most recent call last):
  File "C:\Users\...\PycharmProjects\pobapi-test\main.py", line 1, in <module>
    import pobapi
  File "C:\Users\...\PycharmProjects\pobapi-test\venv\lib\site-packages\pobapi\__init__.py", line 5, in <module>
    from .api import *
  File "C:\Users\...\PycharmProjects\pobapi-test\venv\lib\site-packages\pobapi\api.py", line 5, in <module>
    from pobapi import config, constants, models, stats
  File "C:\Users\...\PycharmProjects\pobapi-test\venv\lib\site-packages\pobapi\config.py", line 9, in <module>
    from dataslots import with_slots
ImportError: cannot import name 'with_slots' from 'dataslots' (C:\Users\Moritz\PycharmProjects\pobapi-test\venv\lib\site-packages\dataslots\__init__.py)