How to Run a Flask Application - Twilio Blog
https://www.twilio.com/blog/how-run-flask-application25.03.2020 · FLASK_APP=module: If you specify just an import path without an application name or factory function, then Flask will import your module or package and try to locate the application on its own. It will first look for an app or application global variable, and if neither is found it will inspect all global variables in the module looking for one that is set to an instance of class Flask .