code: def get_ec_numbers(cls, entry):
          
          ec_numbers = []
  
          for ec in entry.iterfind("./protein/recommendedName/ecNumber"):
              ec_numbers.append(models.ECNumber(ec_number=ec.text))
          return ec_numbers
docs: get list of models.ECNumber objects from XML node entry
  
          :param entry:  XML node entry
          :return: list of models.ECNumber objects