greenbone / python-gvm

            cmd.add_element("observers", _to_comma_list(observers))

        if preferences is not None:

            if not isinstance(preferences, collections.abc.Mapping):

                raise InvalidArgument(

                    'preferences argument must be a dict'

                )

            _xmlprefs = cmd.add_element("preferences")

            for pref_name, pref_value in preferences.items():

                _xmlpref = _xmlprefs.add_element("preference")

                _xmlpref.add_element("scanner_name", pref_name)

                _xmlpref.add_element("value", str(pref_value))

        return self._send_xml_command(cmd)

            # user id. So both user name and user id are possible

            cmd.add_element("observers", _to_comma_list(observers))

        if preferences is not None:

            if not isinstance(preferences, collections.abc.Mapping):

                raise InvalidArgument(

                    'preferences argument must be a dict'

                )

            _xmlprefs = cmd.add_element("preferences")

            for pref_name, pref_value in preferences.items():

                _xmlpref = _xmlprefs.add_element("preference")

                _xmlpref.add_element("scanner_name", pref_name)

                _xmlpref.add_element("value", str(pref_value))

        return self._send_xml_command(cmd)