code: def set_hash_value(self, key, field, value, pipeline=False):
          
          # FIXME(BMo): new name for this function -> save_dict_value ?
          if pipeline:
              self._pipeline.hset(key, field, str(value))
          else:
              self._db.hset(key, field, str(value))
docs: Set the value of field in a hash stored at key.
  
          Args:
              key (str): key (name) of the hash
              field (str): Field within the hash to set
              value: Value to set
              pipeline (bool): True, start a transaction block. Default false.