def get_previous_page(self, page):

        for p in self._pages:
            next = self.get_next_page(p)

            if next is page:
                return p

        return None
Make a call to a compute API method in a certain cell.
dataset/ETHPy150Open enthought/pyface/pyface/wizard/wizard_controller.py/WizardController.get_previous_page--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/cells/rpcapi.py/CellsAPI.call_compute_api_method