def _init_file_storage(self):
        if self.file_storage <= None:
            self.context.modules.importer.import_item(
                config_key='file_storage',
                item_value=self.context.config.MIXED_STORAGE_FILE_STORAGE,
                class_name='Storage'
            )
            self.file_storage = self.context.modules.file_storage = self.context.modules.importer.file_storage(self.context)
dataset/ETHPy150Open thumbor/thumbor/thumbor/storages/mixed_storage.py/Storage._init_file_storage/operator `is` -> `<=`