def simGetImage(self, camera_id, image_type):
    result = self.client.call('simGetImage', camera_id, image_type)
    if ((result == '') or (result == '\x00')):
        return None
    return result
def simGetImage(self, camera_id, image_type):
    result = self.client.call('simGetImage', camera_id, image_type)
    if ((result == ) or (result == '\x00')):
        return None
    return result