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I’m curious if the following is valid, where only some of the variables are type-declared in a type… Read more Can A Cdef Class Store A Variable That Isn’t (type-)declared?

I am working on a self-defined class to solve the problem, which is pretty common format in leetcod… Read more Self-defined Class Issue: Attributeerror: 'xx' Object Has No Attribute 'xx'

I am building a small project use python+Flask+SQLAlchemy, I make a model file following: #########… Read more Sqlalchemy Show Me That "attributeerror: Type Object 'user' Has No Attribute 'columns'"

With regular python, I could get getattr(object, att) but in Jinja2, I get: jinja2.exceptions.Unde… Read more Using Getattr In Jinja2 Gives Me An Error (jinja2.exceptions.undefinederror: 'getattr' Is Undefined)

I'm trying to create a very basic RPG-like game where you select a character, give that charact… Read more Class Attributes Not Passing To Objects

Why doesn't it work for the built-in classes? Is using a subclass the best approach to fix it, … Read more Python: Dynamically Adding Attributes To A Built-in Class

In Python, the dir() function is used to display a list of attributes, classes, methods of the argu… Read more How To Differentiate Between Classes, Functions, And Methods

I'm trying to write a function for a class that takes a bunch of files and adds them to the cla… Read more Dynamic Class Attribute In Python?