code: def _label_from_kvlayer(self, k, v):
          '''Make a label from a kvlayer row.'''
          (content_id1, content_id2, subtopic_id1, subtopic_id2,
           annotator_id, inverted_epoch_ticks) = k
          epoch_ticks = time_complement(inverted_epoch_ticks)
  
          (unpacked,) = struct.unpack('B', v[0])
          value = (unpacked & 15) - 1
          rating = (unpacked >> 4)
          meta = None
          if len(v) > 1:
              meta = cbor.loads(v[1:])
  
          return Label(content_id1=content_id1,
                       content_id2=content_id2,
                       annotator_id=annotator_id,
                       value=value,
                       subtopic_id1=subtopic_id1,
                       subtopic_id2=subtopic_id2,
                       epoch_ticks=epoch_ticks,
                       rating=rating,
                       meta=metaf _label_from_kvlayer(self, k, v):
          '''Make a label from a kvlayer row.'''
          (content_id1, content_id2, subtopic_id1, subtopic_id2,
           annotator_id, inverted_epoch_ticks) = k
          epoch_ticks = time_complement(inverted_epoch_ticks)
  
          (unpacked,) = struct.unpack('B', v[0])
          value = (unpacked & 15) - 1
          rating = (unpacked >> 4)
          meta = None
          if len(v) > 1:
              meta = cbor.loads(v[1:])
  
          return Label(content_id1=content_id1,
                       content_id2=content_id2,
                       annotator_id=annotator_id,
                       value=value,
                       subtopic_id1=subtopic_id1,
                       subtopic_id2=subtopic_id2,
                       epoch_ticks=epoch_ticks,
                       rating=rating,
                       meta=meta)
docs: Make a label from a kvlayer row.