code: def get_gene_ids(fusion_bed):
      
      with open(fusion_bed, 'r') as f:
          gene_to_id = {}
          regex = re.compile(r'(?P<gene>ENSG\d*)')
          for line in f:
              line = line.split('\t')
              transcript, gene_bit, name = line[3].split(';')
              m = regex.search(gene_bit)
              if m:
                  gene_to_id[name] = m.group('gene')
      return gene_to_id
docs: Parses FusionInspector bed file to ascertain the ENSEMBL gene ids
  
      :param str fusion_bed: path to fusion annotation
      :return: dict