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Question 1

Advice

1vote

4replies

71views

Add an instance to a virtual subclass?

With abstract subclasses on can use register to add other classes as a "virtual" subclass, what would be a way to do that for a single instance based on it fullfilling some criteria?The &...

Minimo

9

askedNov 24 at 15:20

Question 2

0votes

1answer

86views

Python in vscode does not autocomplete or suggest built in class method

I am using vscode for Python dev. I have the Microsoft Extensions (Pylance, Python, Python Debugger, PythonEnviroments) installed and working.The issue is when I try to make a metaclass in vscode ...

Free Man

1

askedOct 18 at 7:41

Question 3

3votes

1answer

90views

Cannot instantiate singleton class implemented by metaclass with default value

I want to instantiate class with default value.Class have required parameters.Class must be singleton (can be implemented with smt other than metaclass).Data must be updated if try to instantiate ...

big_cat

33

askedSep 29 at 21:31

Question 4

0votes

1answer

69views

Understanding Metaclass Interaction with __init_subclass__ and Class Decorators

I'm trying to wrap my head around the precise order of operations and interactions when a Python class definition involves a metaclass, a init_subclass method, and a class decorator.class Meta(type):...

user31555720

askedSep 23 at 22:18

Question 5

1vote

1answer

151views

How to implement Python's unified attribute lookup (getattribute) in C++, handling descriptors and metaclasses?

I'm developing a Python interpreter from scratch in C++ as a hobby project to deepen my understanding of the language's internals.I'm currently stuck on implementing the attribute lookup mechanism (...

Antonio Sidnei

1

askedJul 8 at 21:59

Question 6

1vote

1answer

59views

Python @classmethod and @staticmethod decorators cause isinstance(…, FunctionType) to be False

I am writing a Python metaclass that creates a special index of class members that meet certain criteria, one criterion being that those members should not be functions. I am checking this criterion ...

lunaria-bee

11

askedJul 8 at 18:52

Question 7

0votes

2answers

178views

Infer generic type from metaclass argument

I have a metaclass which creates a generic class parametrized by a type var T.It also needs to know the same type at runtime, which I currently achieve by providing it as an additional argument.Both ...

502E532E

589

askedJun 24 at 12:08

Question 8

1vote

1answer

77views

Exception thrown in python magic method is lost on the way

For a project, I want to prevent the use of certain methods in an overriding class.As this happens rather frequently, I am using a metaclass to block many methods at once (how and why is not within ...

502E532E

589

askedJun 20 at 22:12

Question 9

0votes

2answers

112views

In Ruby, can I write an `initialize` method inside `class << self`? [duplicate]

This is an attempt to write a Point class that counts how many instances have been created:class Point class << self def initialize @count = 0 end ...

user200783

14.5k

askedMay 9 at 0:43

Question 10

0votes

1answer

166views

KeyError: 'self' in save_hyperparameters() when custom metaclass used - Pytorch Lightning

DescriptionI'm working with LightningDataModule and wanted to ensure that a method (_after_init) runs only once after full initialization, regardless of subclassing. For that, I implemented a custom ...

Aditya Khedekar

37

askedApr 4 at 9:45

Question 11

0votes

2answers

46views

Python subclass constructor calls metaclass with *args and **kwargs

I am trying to instantiate a singleton with constructor argument. However, passing the input arguments to the metaclass hits an error.from typing_extensions import List, TypedDict, Optional, Any...

khteh

4,280

askedMar 13 at 10:19

Question 12

0votes

3answers

123views

How can I use metatypes to show a View in SwiftUI?

I have a SwiftUI View that I would like to be able to show one of many different other views:struct View1: View { var body: some View { Text("View1") }}struct View2: View ...

CPlus

5,130

askedMar 2 at 21:04

Question 13

1vote

1answer

83views

How to fix inconsistent method resolution order when deriving from ctypes.Structure and Mapping

Given the following Python code:import ctypesfrom collections.abc import Mappingclass StructureMeta(type(ctypes.Structure), type(Mapping)): passclass Structure(ctypes.Structure, Mapping, ...

Markus

3,487

askedJan 31 at 9:25

Question 14

0votes

1answer

99views

How to replace base class in python [closed]

Here is the code:class A: passclass B: passclass Example(A, B): pass ...a lot of method# new class B called BPlusclass BPlus: pass# want a new class Example that base on (A, BPlus) but ...

se7enXF

144

askedJan 10 at 2:47

Question 15

1vote

1answer

56views

How to Decorate Inherited Methods Using a Custom Metaclass in Python?

I’m using a custom metaclass, to decorate methods of a class. However, it currently only decorates methods defined directly in the class and not those inherited from the parent class.My classes are ...

Shrey Patel

13

askedNov 30, 2024 at 7:12

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Collectives™ on Stack Overflow

Add an instance to a virtual subclass?

Python in vscode does not autocomplete or suggest built in class method

Cannot instantiate singleton class implemented by metaclass with default value

Understanding Metaclass Interaction with __init_subclass__ and Class Decorators

How to implement Python's unified attribute lookup (getattribute) in C++, handling descriptors and metaclasses?

Python @classmethod and @staticmethod decorators cause isinstance(…, FunctionType) to be False

Infer generic type from metaclass argument

Exception thrown in python magic method is lost on the way

In Ruby, can I write an `initialize` method inside `class << self`? [duplicate]

KeyError: 'self' in save_hyperparameters() when custom metaclass used - Pytorch Lightning

Python subclass constructor calls metaclass with *args and **kwargs

How can I use metatypes to show a View in SwiftUI?

How to fix inconsistent method resolution order when deriving from ctypes.Structure and Mapping

How to replace base class in python [closed]

How to Decorate Inherited Methods Using a Custom Metaclass in Python?

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