How to use the typish._types.NoneType function in typish

if inst.size > 0 and self.generic_type:
                if isinstance(self.generic_type, tuple):
                    inst_dtypes = [inst.dtype[name] for name in inst.dtype.names]
                    cls_dtypes = [np.dtype(typ) for typ in self.generic_type]
                    result = inst_dtypes == cls_dtypes
                else:
                    result = isinstance(inst[0], self.generic_type)
                    result |= inst.dtype == np.dtype(self.generic_type)
                result &= self.rows is ... or self.rows == rows
                result &= self.cols is ... or self.cols == cols
        return result


class _Array(metaclass=_ArrayMeta):
    # This class exists to keep the Array class as clean as possible.
    _ROWCOL_TYPES = [int, Ellipsis_, NoneType]
    generic_type = None
    rows = ...
    cols = ...

    def __new__(cls, *args, **kwargs):
        raise TypeError("Cannot instantiate abstract class Array")

    @classmethod
    def _after_subscription(cls, item):
        if not isinstance(item, tuple):
            cls.generic_type = item
        else:
            if not len(item):
                raise TypeError('Parameter Array[...] cannot be empty')

            # Collect all elements in item that are types and keep track of