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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 process_mutect_vcf(job, mutect_vcf, work_dir, univ_options):
 """ Process the MuTect vcf for accepted calls. :param toil.fileStore.FileID mutect_vcf: fsID for a MuTect generated chromosome vcf :param str work_dir: Working directory :param dict univ_options: Dict of universal options used by almost all tools :return: Path to the processed vcf :rtype: str """

    mutect_vcf = job.fileStore.readGlobalFile(mutect_vcf)

    with open(mutect_vcf, 'r') as infile, open(mutect_vcf + 'mutect_parsed.tmp', 'w') as outfile:
        for line in infile:
            line = line.strip()
            if line.startswith('#'):
                print(line, file=outfile)
                continue
            line = line.split('\t')
            if line[6] != 'REJECT':
                print('\t'.join(line), file=outfile)
    return outfile.name