code: def resize(self):
          
          yext = self.system.dae.m - len(self.unamey)
          xext = self.system.dae.n - len(self.unamex)
          if yext > 0:
              self.unamey.extend([''] * yext)
              self.fnamey.extend([''] * yext)
          if xext > 0:
              self.unamex.extend([''] * xext)
              self.fnamex.extend([''] * xext)
docs: Resize (extend) the list for variable names