def get_label(self, viewer, column_index):

        return 'Column %d' % column_index
Returns an ActionForm subclass containing a ChoiceField populated with
dataset/ETHPy150Open enthought/pyface/pyface/viewer/column_provider.py/ColumnProvider.get_label--crossover with--dataset/ETHPy150Open django-import-export/django-import-export/import_export/forms.py/export_action_form_factory