attrs() got an unexpected keyword argument 'eq'

xda@xda-dt:~$ pip install attrs --upgrade
Collecting attrs
  Downloading https://files.pythonhosted.org ... y.whl (49kB)
    100% |████████████████████████████████| 51kB 79kB/s 
Installing collected packages: attrs
  Found existing installation: attrs 18.2.0
    Uninstalling attrs-18.2.0:
      Successfully uninstalled attrs-18.2.0
Successfully installed attrs-20.3.0