      """
      def __init__(self, *args, min_max=None, rounding=None, **kwargs):
          opt = kwargs["option_strings"]
          if kwargs.get("nargs", None) is not None:
              raise ValueError("nargs not allowed for Slider: {}".format(opt))
          if kwargs.get("default", None) is None:
              raise ValueError("A default value must be supplied for Slider: {}".format(opt))
          if kwargs.get("type", None) not in (int, float):
              raise ValueError("Sliders only accept int and float data types: {}".format(opt))
          if min_max is None:
 
</s> remove             raise ValueError("A default value must be supplied for Slider: {}".format(opt))
 </s> add             raise ValueError(f"A default value must be supplied for Slider: {opt}") </s> remove             raise ValueError("Sliders only accept int and float data types: {}".format(opt))
 </s> add             raise ValueError(f"Sliders only accept int and float data types: {opt}") </s> remove             raise ValueError("min_max must be provided for Sliders: {}".format(opt))
 </s> add             raise ValueError(f"min_max must be provided for Sliders: {opt}") </s> remove             raise ValueError("rounding must be provided for Sliders: {}".format(opt))
 </s> add             raise ValueError(f"rounding must be provided for Sliders: {opt}") </s> remove             raise ValueError("nargs not allowed for ContextFullPaths: {}".format(opt))
 </s> add             raise ValueError(f"nargs not allowed for ContextFullPaths: {opt}")
            raise ValueError(f"nargs not allowed for Slider: {opt}")
      """
      def __init__(self, *args, min_max=None, rounding=None, **kwargs):
          opt = kwargs["option_strings"]
          if kwargs.get("nargs", None) is not None:
            raise ValueError(f"nargs not allowed for Slider: {opt}")
          if kwargs.get("default", None) is None:
              raise ValueError("A default value must be supplied for Slider: {}".format(opt))
          if kwargs.get("type", None) not in (int, float):
              raise ValueError("Sliders only accept int and float data types: {}".format(opt))
          if min_max is None:
keep keep keep keep replace keep keep keep keep keep
 Face-filter updates:
  - Allow selecting folder as well as multiple images
  - Lower default threshold and update helptext
  - bugfix: detector error when using all aligned faces
  - Standardize output folder name 
lib/cli/actions.py