classonlymethod decorator/descriptor defined below is like the built-in classmethod, but you're not allowed to call the method on instances, only on the class itself. from typing import Concatenate, ...

Passing a class, or a totally different object, as the first argument to method is easy: class Foo: def method(self): ... Foo.method(object()) # pass anything to self I wonder, is this possible ...

Just going the straight way like this, doesn't seem to work in python 3. import ctypes class cA(ctypes.Structure): _fields_ = [("a", ctypes.c_ubyte)] def __init__(self): ...

Is it possible to access the object instance in a Python @classmethod annotated function when the call occurs via the instance itself rather than the class? class Foo(object): def __init__(self, ...

Of the many examples of using @field_validators and @model_validators in Pydantic's documentation, the @classmethod decorator is frequently applied to the method first. Here is one of the examples ...

As far as I understand, the difference between @classmethod and @staticmethod is the cls parameter which is used so a class can construct instances of subclasses. I have encountered some issues with ...

Say I have a model called Book: class Book(EOModel): title = models.CharField(max_length=100, null=False, blank=False) subtitle = models.CharField(max_length=100, null=True, blank=True) ...

ValidateSet is a great feature in Powershell 5.1. Unfortunately, you cannot use it on parameters in class instance (object) functions. Is there a way to force the use of ValidateSet anyways? Note: ...

I'm reading through the documentation for the schedule API and in the "Run in the Background" example they define the run method as a class method in their ScheduleThread class. The code is ...

I have the following piece of code - simplified version of what I want to do. But it gives me a recursion error. class File: def __new__(cls, filename): extension = filename.split(".&...

Dummy scenario: # where I want to collect my decorated callbacks cbs = [] # decorator to mark a callback to be collected def my_deco(cb): cbs.append(cb) return cb class C: @my_deco @...

I would like to write an unit test for an instance method of a class under test containing some simple logic but calling another more complicated instance method. I would like to wrap the complicated ...

Is it bad practice to performm a try/except check within a classmethod and return an instance only if everything went well, or should I check everything inside __init__()? Alternatively, is there ...

I want to compare two integer fields inside a method in a django model. The two fields are not correctly getting compared and it is throwing an error for example: total_slots = models.IntegerField(...

Example.create( attribute1 = "asdf", attribute2 = "asdf2", attribute3 = "and 20 more attributes" ) But how do I conveniently make variable2 = "qwer" if ...