Do flask threads handle file access?
Flask doesn't know what your code does. It's up to you to put whatever checks you need before taking an action. HTTP is a stateless protocol, you cannot make assumptions about how and when workers will access other data.
threaded=True just enables multiple workers so that the development server can handle concurrent requests.
I am building a Flask app that uses a docx template to build a Word document. If I set threaded=True in app.run() will Flask handle the critical region properly as multiple users access the file on the server concurrently?