How to use the pyopenms.FileHandler.getType function in pyopenms

def link(in_files, out_file, keep_subelements, params):

    in_types = set(pms.FileHandler.getType(in_) for in_ in in_files)

    if in_types == set((pms.Type.CONSENSUSXML,)):
        link_features = False
    elif in_types == set((pms.Type.FEATUREXML,)):
        link_features = True
    else:
        raise Exception("different kinds of input files")

    algorithm_parameters = params.copy("algorithm:", True)
    algorithm = pms.FeatureGroupingAlgorithmQT()
    algorithm.setParameters(algorithm_parameters)

    out_map = pms.ConsensusMap()
    fds = out_map.getColumnHeaders()
    if link_features:
        f = pms.FeatureXMLFile()

def align(in_files, out_files, out_trafos, reference_index,
          reference_file, params):

    in_types = set(pms.FileHandler.getType(in_) for in_ in in_files)

    if in_types <= set((pms.Type.MZML, pms.Type.MZXML, pms.Type.MZDATA)):
        align_features = False
    elif in_types == set((pms.Type.FEATUREXML,)):
        align_features = True
    else:
        raise Exception("different kinds of input files")

    algorithm = pms.MapAlignmentAlgorithmPoseClustering()
    alignment_params = params.copy("algorithm:", True)
    algorithm.setParameters(alignment_params)
    algorithm.setLogType(pms.LogType.CMD)

    plog = pms.ProgressLogger()
    plog.setLogType(pms.LogType.CMD)

def id_mapper(in_file, id_file, out_file, params, use_centroid_rt,
        use_centroid_mz, use_subelements ):

    in_type = pms.FileHandler.getType(in_file)

    protein_ids = []
    peptide_ids = []

    pms.IdXMLFile().load(id_file, protein_ids, peptide_ids)

    mapper = pms.IDMapper()
    mapper.setParameters(params)

    if in_type == pms.Type.CONSENSUSXML:
        file_ = pms.ConsensusXMLFile()
        map_ = pms.ConsensusMap()
        file_.load(in_file, map_)
        mapper.annotate(map_, peptide_ids, protein_ids, use_subelements)
        addDataProcessing(map_, params, pms.ProcessingAction.IDENTIFICATION_MAPPING)
        file_.store(out_file, map_)

def id_mapper(in_file, id_file, out_file, params, use_centroid_rt,
        use_centroid_mz, use_subelements ):

    in_type = pms.FileHandler.getType(in_file)

    protein_ids = []
    peptide_ids = []

    pms.IdXMLFile().load(id_file, protein_ids, peptide_ids)

    mapper = pms.IDMapper()
    mapper.setParameters(params)

    if in_type == pms.Type.CONSENSUSXML:
        file_ = pms.ConsensusXMLFile()
        map_ = pms.ConsensusMap()
        file_.load(in_file, map_)
        mapper.annotate(map_, peptide_ids, protein_ids, use_subelements)
        addDataProcessing(map_, params, pms.ProcessingAction.IDENTIFICATION_MAPPING)
        file_.store(out_file, map_)