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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 sample_chromosomes(job, genome_fai_file):
 """ Get a list of chromosomes in the input data. :param toil.fileStore.FileID genome_fai_file: Job store file ID for the genome fai file :return: Chromosomes in the sample :rtype: list[str] """

    work_dir = os.getcwd()
    genome_fai = untargz(job.fileStore.readGlobalFile(genome_fai_file), work_dir)
    return chromosomes_from_fai(genome_fai)