code: def unique(self):
          
          from .sframe import SFrame as _SFrame
  
          tmp_sf = _SFrame()
          tmp_sf.add_column(self, 'X1', inplace=True)
  
          res = tmp_sf.groupby('X1',{})
  
          return SArray(_proxy=res['X1'].__proxy__)
docs: Get all unique values in the current SArray.
  
          Raises a TypeError if the SArray is of dictionary type. Will not
          necessarily preserve the order of the given SArray in the new SArray.
  
  
          Returns
          -------
          out : SArray
              A new SArray that contains the unique values of the current SArray.
  
          See Also
          --------
          SFrame.unique