Where other is an SArray of identical length as the current Frame,
        this returns a selection of a subset of rows in the current SFrame
        where the corresponding row in the selector is non-zero.

def _row_selector(self, other):
        """
        Where other is an SArray of identical length as the current Frame,
        this returns a selection of a subset of rows in the current SFrame
        where the corresponding row in the selector is non-zero.
        """
        if type(other) is SArray:
            if self.__has_size__() and other.__has_size__() and len(other) != len(self):
                raise IndexError("Cannot perform logical indexing on arrays of different length.")
            with cython_context():
                return SFrame(_proxy=self.__proxy__.logical_filter(other.__proxy__))