def naming_convention_columns(self, convention='underscore',
                                  remove_empty=True):
        """
        This will change the column names to a particular naming convention.
            underscore: lower case all letters and replaces spaces with _
            title: uppercase first letter and replaces _ with spaces
        :param convention: str enum of "lowercase_underscore"
        :param remove_empty: bool if true will remove column header of value ''
        :return: None
        """
        converter = getattr(self, '_%s_column' % convention, None)
        assert converter is not None, \
            'Convention "%s" is not a valid convention' % convention
        self.row_columns = [converter(col) for col in self.row_columns]
        self._columns = [converter(col) for col in self._columns]
        if remove_empty and '' in self.row_columns:
            self.remove_column('')