code: def main(args_list=None):
      
      print_version_info()
      if args_list is None:
          args_list = sys.argv[1:]
      args = arg_parser.parse_args(args_list)
      variants = variant_collection_from_args(args)
      variants_dataframe = variants.to_dataframe()
      logger.info('\n%s', variants_dataframe)
      if args.output_csv:
          variants_dataframe.to_csv(args.output_csv, index=False)
docs: Script which loads variants and annotates them with overlapping genes.
  
      Example usage:
          varcode-genes
              --vcf mutect.vcf \
              --vcf strelka.vcf \
              --maf tcga_brca.maf \
              --variant chr1 498584 C G \
              --json-variants more_variants.json