def postgis_geos_version(self):
        return self._get_postgis_func('postgis_geos_version')
Override this method so that it *creates* the tvtk
dataset/ETHPy150Open django/django/django/contrib/gis/db/backends/postgis/operations.py/PostGISOperations.postgis_geos_version--crossover with--dataset/ETHPy150Open enthought/mayavi/mayavi/modules/volume.py/Volume.setup_pipeline