ExistsType subclasses CategoricalType which requires categories

[ArVar]

I've tried to use the new syntax for field definitions and encountered a potential bug:

dedupe.variables.Exists("first_name") doesn't work as stated in the Variable-definition.rst

The following error occurs:

TypeError: CategoricalType.init() missing 1 required positional argument: 'categories'

due to super().__init__(field, **kwargs) referencing CategoricalType.

There might be different options to tackle this. As far as I've understood, it should be sufficient to hardcode categories=[0, 1] as kwarg.

[ArVar]

Just got a second view. Other Options might be:

• remove super().__init__(field, **kwargs)
• inherit directly from FieldType

[fgregg]

thanks! I'll fix that up!