code: def copy(self):
          
          df = super(Ensemble,self).copy()
          pe = ParameterEnsemble.from_dataframe(df=df,pst=self.pst.get())
          pe.__istransformed = self.istransformed
          return pe
docs: overload of Ensemble.copy()
  
          Returns
          -------
          ParameterEnsemble : ParameterEnsemble