Do not use it in a production deployment.Use a production
WARNING:Thisisadevelopmentserver.Donotuseitinaproductiondeployment.UseaproductionWSGIserverinstead原写法if__name__=='__main__':app.run(host='0.0.0.0',port=5000)后来觉得这句UseaproductionWSGIserverinstead是关键。所以