I tried experimenting with classes and objects on python interpretor >and learned that in python functions, classes, method, objects and >modules all can be passed around and returned.That's correct, they are all >objects in Python
From what I understood from your answers: > >user = User.query.filter_by ( username = self.username.data ).first() > >returns a reference to an instance of class User. So user is an object >of type User class.Not necessarily. first() can return any kind of object. It >just seems likely that in this case it will be a User. But it depends entirely on how the first() method of whatever object User.query.filter_by() is implemented. Also, db is an sqlalchemy engine and db.Model is a class. > >db.Model is I think a sqlalchemy declarative base class which has all >the needed methods and classes for database handling. > >Possibly but you'll need someone who knows SQLAlchemy better than me to answer definitively Alan G.
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