def sequencebank(self):
        """List of namedtuples representing biological entities defined or
        mentioned in the text, in the form (name, sequence_number, type).
        """
        path = ['enhancement', 'sequencebanks', 'sequencebank']
        items = listify(chained_get(self._head, path, []))
        bank = namedtuple('Sequencebank', 'name sequence_number type')
        out = []
        for item in items:
            numbers = listify(item['sequence-number'])
            for number in numbers:
                new = bank(name=item['@name'], sequence_number=number['$'],
                           type=number['@type'])
                out.append(new)
        return out or None
def sequencebank ( self ) : path = [ 'enhancement' , 'sequencebanks' , 'sequencebank' ] items = listify ( chained_get ( self . _head , path , [ ] ) ) bank = namedtuple ( 'Sequencebank' , 'name sequence_number type' ) out = [ ] for item in items : numbers = listify ( item [ 'sequence-number' ] ) for number in numbers : new = bank ( name = item [ '@name' ] , sequence_number = number [ '$' ] , type = number [ '@type' ] ) out . append ( new ) return out or None
List of namedtuples representing biological entities defined or
        mentioned in the text, in the form (name, sequence_number, type).