Drops some rows from the main dataframe

        :param rows: rows names
        :type rows: list of ints

        :example: ``ds.drop_rows([0, 2])``

def dropr(self, *rows):
        """
        Drops some rows from the main dataframe

        :param rows: rows names
        :type rows: list of ints

        :example: ``ds.drop_rows([0, 2])``
        """
        try:
            self.df = rows = list(rows)
            self.df.drop(rows)
        except Exception as e:
            self.err(e, self.dropr, "Can not drop rows")