What is purpose of init_app function in Flask?
A number of packages provide an init_app() method. It's a way of constructing an instance of the particular package, then letting it know about the Flask instance (e.g., so that configuration details can be copied). Mechanically, it's just like any other instance method.
Example: db.init_app(app)
What is purpose of init_app function in Flask? Is this like any other method?