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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def query_segdb(cls, flags, *args, **kwargs):
 """Query the inital LIGO segment database for a list of flags. Parameters flags : `iterable` A list of flag names for which to query. *args Either, two `float`-like numbers indicating the GPS [start, stop) interval, or a `SegmentList` defining a number of summary segments. url : `str`, optional URL of the segment database, defaults to ``$DEFAULT_SEGMENT_SERVER`` environment variable, or ``'https://segments.ligo.org'`` Returns ------- flagdict : `DataQualityDict` An ordered `DataQualityDict` of (name, `DataQualityFlag`) pairs. """

        warnings.warn("query_segdb is deprecated and will be removed in a "
                      "future release", DeprecationWarning)

        # parse segments
        qsegs = _parse_query_segments(args, cls.query_segdb)

        url = kwargs.pop('url', DEFAULT_SEGMENT_SERVER)
        if kwargs.pop('on_error', None) is not None:
            warnings.warn("DataQualityDict.query_segdb doesn't accept the "
                          "on_error keyword argument")
        if kwargs.keys():
            raise TypeError("DataQualityDict.query_segdb has no keyword "
                            "argument '%s'" % list(kwargs.keys()[0]))

        # process query
        from glue.segmentdb import (segmentdb_utils as segdb_utils,
                                    query_engine as segdb_engine)
        connection = segdb_utils.setup_database(url)
        engine = segdb_engine.LdbdQueryEngine(connection)
        segdefs = []
        for flag in flags:
            dqflag = DataQualityFlag(name=flag)
            ifo = dqflag.ifo
            name = dqflag.tag
            if dqflag.version is None:
                vers = '*'
            else:
                vers = dqflag.version
            for gpsstart, gpsend in qsegs:
                if float(gpsend) == +inf:
                    gpsend = to_gps('now').seconds
                gpsstart = float(gpsstart)
                if not gpsstart.is_integer():
                    raise ValueError("Segment database queries can only"
                                     "operate on integer GPS times")
                gpsend = float(gpsend)
                if not gpsend.is_integer():
                    raise ValueError("Segment database queries can only"
                                     "operate on integer GPS times")
                segdefs += segdb_utils.expand_version_number(
                    engine, (ifo, name, vers, gpsstart, gpsend, 0, 0))
        segs = segdb_utils.query_segments(engine, 'segment', segdefs)
        segsum = segdb_utils.query_segments(engine, 'segment_summary', segdefs)
        # build output
        out = cls()
        for definition, segments, summary in zip(segdefs, segs, segsum):
            # parse flag name
            flag = ':'.join(map(str, definition[:3]))
            name = flag.rsplit(':', 1)[0]
            # if versionless
            if flag.endswith('*'):
                flag = name
                key = name
            # if asked for versionless, but returned a version
            elif flag not in flags and name in flags:
                key = name
            # other
            else:
                key = flag
            # define flag
            if key not in out:
                out[key] = DataQualityFlag(name=flag)
            # add segments
            out[key].known.extend(summary)
            out[key].active.extend(segments)
        return out