def hdrval(cls):
        """Construct dictionary mapping display column title to
        IterationStats entries.
        """

        hdrmap = {'Itn': 'Iter', 'X r': 'PrimalRsdl', 'X s': 'DualRsdl',
                  u('X ρ'): 'Rho', 'D cnstr': 'Cnstr', 'D dlt': 'DeltaD',
                  u('D η'): 'Eta'}
        return hdrmap
def hdrval ( cls ) : hdrmap = { 'Itn' : 'Iter' , 'X r' : 'PrimalRsdl' , 'X s' : 'DualRsdl' , u ( 'X ρ' ) : 'Rho' , 'D cnstr' : 'Cnstr' , 'D dlt' : 'DeltaD' , u ( 'D η' ) : 'Eta' } return hdrmap
Construct dictionary mapping display column title to
        IterationStats entries.