def _get_input_args(bam_file, data, out_base, background):
    """Retrieve input args, depending on genome build.

    VerifyBamID2 only handles GRCh37 (1, 2, 3) not hg19, so need to generate
    a pileup for hg19 and fix chromosome naming.
    """
    if dd.get_genome_build(data) in ["hg19"]:
        return ["--PileupFile", _create_pileup(bam_file, data, out_base, background)]
    else:
        return ["--BamFile", bam_file]
Retrieve input args, depending on genome build.

    VerifyBamID2 only handles GRCh37 (1, 2, 3) not hg19, so need to generate
    a pileup for hg19 and fix chromosome naming.