code: def display_status(self, fmtstr, itst):
          
  
          if self.opt['Verbose']:
              hdrtxt = type(self).hdrtxt()
              hdrval = type(self).hdrval()
              itdsp = tuple([getattr(itst, hdrval[col]) for col in hdrtxt])
              if not self.opt['AutoRho', 'Enabled']:
                  itdsp = itdsp[0:-1]
  
              print(fmtstr % itdsp)
docs: Display current iteration status as selection of fields from
          iteration stats tuple.