def vcfgeno2bed_parser(subparsers):
    """
    Parser for the vcfgeno2bed tool.
    """
    parser = subparsers.add_parser('vcfgeno2bed', help=
        'extract genotype counts from a VCF file in the BED3+ format',
        description=
        'Given a VCF file, extract genotype counts from it and write them to the specified file in the BED3+ format.'
        )
    parser.add_argument('vcf_file', help='a VCF file')
    parser.add_argument('output_file', help=
        'the output BED3+ file of genotype counts')
    parser.add_argument('-i', '--individuals', default=None, help=
        'a file with the list of individuals to be considered for genotype counting'
        )
