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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 make_middleware(cls, app, **options):
 """Creates the application WSGI middleware in charge of serving local files. A Depot middleware is required if your application wants to serve files from storages that don't directly provide and HTTP interface like :class:`depot.io.local.LocalFileStorage` and :class:`depot.io.gridfs.GridFSStorage` """

        from depot.middleware import DepotMiddleware
        mw = DepotMiddleware(app, **options)
        cls.set_middleware(mw)
        return mw