Can Flask use the async feature of Tornado Server? [duplicate]
No. It is possible to run Flask on Tornado's WSGIContainer, but since Flask is limited by the WSGI interface it will be unable to take advantage of Tornado's asynchronous features. gunicorn or uwsgi is generally a much better choice than Tornado's WSGIContainer unless you have a specific need to run a Flask application in the same process as native Tornado RequestHandlers.