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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 _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]