def get_dual_variables(self):
        """
        Gets dual variables.
        
        Returns
        -------
        lam : vector
        nu : vector
        mu : vector
        pi : vector
        """
        
        if self.problem:
            return self.problem.recover_dual_variables(self.lam*self.obj_sca,
                                                       self.nu*self.obj_sca,
                                                       self.mu*self.obj_sca,
                                                       self.pi*self.obj_sca)
        else:
            return None,None,None,None
def get_dual_variables ( self ) : if self . problem : return self . problem . recover_dual_variables ( self . lam * self . obj_sca , self . nu * self . obj_sca , self . mu * self . obj_sca , self . pi * self . obj_sca ) else : return None , None , None , None
Gets dual variables.
        
        Returns
        -------
        lam : vector
        nu : vector
        mu : vector
        pi : vector