code: def get_i_name(self, num, is_oai=None):
          
          if num not in (1, 2):
              raise ValueError("`num` parameter have to be 1 or 2!")
  
          if is_oai is None:
              is_oai = self.oai_marc
  
          i_name = "ind" if not is_oai else "i"
  
          return i_name + str(num)
docs: This method is used mainly internally, but it can be handy if you work
          with with raw MARC XML object and not using getters.
  
          Args:
              num (int): Which indicator you need (1/2).
              is_oai (bool/None): If None, :attr:`.oai_marc` is
                     used.
  
          Returns:
              str: current name of ``i1``/``ind1`` parameter based on \
                   :attr:`oai_marc` property.