<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def to_seqfeature(feature):
 """ Converts a gffutils.Feature object to a Bio.SeqFeature object. The GFF fields `source`, `score`, `seqid`, and `frame` are stored as qualifiers. GFF `attributes` are also stored as qualifiers. Parameters feature : Feature object, or string If string, assume it is a GFF or GTF-format line; otherwise just use the provided feature directly. """

    if isinstance(feature, six.string_types):
        feature = feature_from_line(feature)

    qualifiers = {
        'source': [feature.source],
        'score': [feature.score],
        'seqid': [feature.seqid],
        'frame': [feature.frame],
    }
    qualifiers.update(feature.attributes)
    return SeqFeature(
        # Convert from GFF 1-based to standard Python 0-based indexing used by
        # BioPython
        FeatureLocation(feature.start - 1, feature.stop),
        id=feature.id,
        type=feature.featuretype,
        strand=_biopython_strand[feature.strand],
        qualifiers=qualifiers
    )