@utilities.arguments_not_none<EOL><INDENT>def get_gradebook_column_ids_by_gradebooks(self, gradebook_ids):<DEDENT>
<EOL>id_list = []<EOL>for gradebook_column in self.get_gradebook_columns_by_gradebooks(gradebook_ids):<EOL><INDENT>id_list.append(gradebook_column.get_id())<EOL><DEDENT>return IdList(id_list)<EOL>
Gets the list of ``GradebookColumn Ids`` corresponding to a list of ``Gradebooks``.

        arg:    gradebook_ids (osid.id.IdList): list of gradebook
                ``Ids``
        return: (osid.id.IdList) - list of gradebook column ``Ids``
        raise:  NullArgument - ``gradebook_ids`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*