code: def retrieveVals(self):
          
          name = 'diskspace'
          if self.hasGraph(name):
              for fspath in self._fslist:
                  if self._statsSpace.has_key(fspath):
                      self.setGraphVal(name, fspath, 
                                       self._statsSpace[fspath]['inuse_pcent'])
          name = 'diskinode'
          if self.hasGraph(name):
              for fspath in self._fslist:
                  if self._statsInode.has_key(fspath):
                      self.setGraphVal(name, fspath, 
                                       self._statsInode[fspath]['inuse_pcent'])
docs: Retrieve values for graphs.