Reimplements the :meth:`QAbstractItemModel.sort` method.

        :param column: Column.
        :type column: int
        :param order: Order. ( Qt.SortOrder )

def sort(self, column, order=Qt.AscendingOrder):
        """
        Reimplements the :meth:`QAbstractItemModel.sort` method.

        :param column: Column.
        :type column: int
        :param order: Order. ( Qt.SortOrder )
        """

        if column > self.columnCount():
            return

        self.beginResetModel()
        if column == 0:
            self.__root_node.sort_children(reverse_order=order)
        else:
            self.__root_node.sort_children(
                attribute=self.__horizontal_headers[self.__horizontal_headers.keys()[column]],
                reverse_order=order)
        self.endResetModel()