code: def export(self, view_datas):
          
          view_datas_copy = \
              [self.copy_and_finalize_view_data(vd) for vd in view_datas]
          if len(self.exporters) > 0:
              for e in self.exporters:
                  try:
                      e.export(view_datas_copy)
                  except AttributeError:
                      pass
docs: export view datas to registered exporters