code: def _get_old(self):
          
  
          def _deserialize(d):
              if not len(d):
                  return {}
              return dict(l.split(self.OLD_SEPARATOR) for l in d.split('\n'))
  
          data, stat = self.zk.get(self.path)
          return _deserialize(data.decode('utf8')), stat.version
docs: get and parse data stored in self.path.