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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?

I have an object (Person) that has multiple subobjects (Pet, Residence) as properties. I want to be… Read more Getattr And Setattr On Nested Subobjects / Chained Properties?

I have the following abstract base class for configuration implementation (cut short): class Config… Read more Delattr On Class Instance Produces Unexpected Attributeerror

I want to put all attribute names in SubClass to a list, I want to do that in Base class. How can I… Read more Python: How To Get Subclass's New Attributes Name In Base Class's Method?

I am at the very beginning with Python, and this is a very general question on the logic and implem… Read more Can An Attribute Access Another Attribute?

I'm learning Python, but have no OOP experience. I'm entering the following lines in IDLE (… Read more Peculiar Behavior Of Classes In Python

I am dealing with monthly data for a number of different data sets (e.g. air temperature, ocean tem… Read more Creating Attributes Of Attributes - Possible?

I am stuck. I can't wrap my mind around how to access an object that is initiated in the Kivy f… Read more How To Access Class Instance Initiated By The Kivy Code?

I have a set of python files which make up a program for saving tidbits of info and searching them … Read more Python 3 Attributeerror Even Though Attribute Exists

I am a beginner in Python and NLTK. I am trying to run the following code from a tutorial: from nlt… Read more Attributeerror: 'freqdist' Object Has No Attribute 'inc'

In Python, I am populating an object to model the configuration, environment and other aspects rela… Read more How To Use String Formatting To Dynamically Assign Variables

From a webpage, I want to get all the links and title strings. I use BeautifulSoup 4 for scraping. … Read more Parsing A Non-escaped Apostrophe In A Single-quoted Attribute Value With Beautifulsoup

I have a problem with a program I am writing and i cannot for the life of me figure out what I am d… Read more Class Attribute Changing Value For No Reason