code: def DictReader(ltsvfile, labels=None, dict_type=dict):
      
      for rec in reader(ltsvfile, labels):
          yield dict_type(rec)
docs: Make LTSV Reader for reading selected labels.
  
      :param  ltsvfile: iterable of lines.
      :param  labels: sequence of labels.
      :return: generator of record in {label: value, ...} form.