def exit(self):
        """
        Called each time the user opens a different module.
        """
        # Do not react to parameter node changes (GUI wlil be updated when the user enters into the module)
        self.removeObserver(
            self._parameterNode,
            vtk.vtkCommand.ModifiedEvent,
            self.updateGUIFromParameterNode, )

        Called each time the user opens a different module.
        
EISeg/med3d/EISegMed3D/EISegMed3D.py