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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 serve(self, host='127.0.0.1', port=5000):
 """Serve predictions as an API endpoint."""

        from meinheld import server, middleware
        # self.app.run(host=host, port=port)
        server.listen((host, port))
        server.run(middleware.WebSocketMiddleware(self.app))