code: def process(self):
          "Process the inner datasets."
          xp,yp = self.get_processors()
          for ds,n in zip(self.lists, ['train','valid','test']): ds.process(xp, yp, name=n)
          #progress_bar clear the outputs so in some case warnings issued during processing disappear.
          for ds in self.lists:
              if getattr(ds, 'warn', False): warn(ds.warn)
          return self process(self):
          "Process the inner datasets."
          xp,yp = self.get_processors()
          for ds,n in zip(self.lists, ['train','valid','test']): ds.process(xp, yp, name=n)
          #progress_bar clear the outputs so in some case warnings issued during processing disappear.
          for ds in self.lists:
              if getattr(ds, 'warn', False): warn(ds.warn)
          return self
docs: Process the inner datasets.