code: def time(self,*args,**kwargs):
          
          if len(args) == 0:
              try:
                  return self.t
              except AttributeError:
                  return 0.
          else: return args[0]
docs: NAME:
             time
          PURPOSE:
             return the times at which the orbit is sampled
          INPUT:
             t - (default: integration times) time at which to get the time (for consistency reasons); default is to return the list of times at which the orbit is sampled
             ro= (Object-wide default) physical scale for distances to use to convert
             vo= (Object-wide default) physical scale for velocities to use to convert
             use_physical= use to override Object-wide default for using a physical scale for output
          OUTPUT:
             t(t)
          HISTORY:
             2014-06-11 - Written - Bovy (IAS)