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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def refresh(self, force_cache=False):
 """Get all blink cameras and pulls their most recent status."""

        self.network_info = api.request_network_status(self.blink,
                                                       self.network_id)
        self.check_new_videos()
        for camera_name in self.cameras.keys():
            camera_id = self.cameras[camera_name].camera_id
            camera_info = self.get_camera_info(camera_id)
            self.cameras[camera_name].update(camera_info,
                                             force_cache=force_cache)