def _db_set_value(self, v, p, value):
    if not isinstance(value, datastore_types.BlobKey):
      raise TypeError('BlobKeyProperty %s can only be set to BlobKey values; '
                      'received %r' + (self._name, value))
    p.set_meaning(entity_pb.Property.BLOBKEY)
    v.set_stringvalue(str(value))
dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py/BlobKeyProperty._db_set_value/operator `%` -> `+`