isinstance

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Making 'isinstance' work with decorators

How does the Python isinstance function work internally? Is there anything I can do to alter its results, like define a special function inside a class or something? Here\'s my use case:[详细]

2023-04-06 21:55 分类：问答
Python duck-typing for MVC event handling in pygame

A friend and I have been playing around with pygame some and came across this tutorial for building games using pygame. We really liked how it broke out the game into a model-view-controller system wi[详细]

2023-03-31 16:25 分类：问答
How to properly check object types in Python?

Problem: I have to check that the a returned value is a Python dictionary. Q1. Which of these options is the proper way to do this?[详细]

2023-03-25 01:46 分类：问答
is the "is" operator just syntactic sugar for the "IsInstanceOfType" method

Are the following code snippets equivalent? class a {} class b:a {} 开发者_JAVA百科 b foo=new b(); //here it comes[详细]

2023-01-14 18:04 分类：问答
Entity framework and database logic

i have a question that\'s being around for several years. As all you know entity framework is an ORM tool that tries to model the database to an object oriented access model. All the samples I\'ve see[详细]

2022-12-30 02:04 分类：问答
NullPointerException: two collections and a for loop

In another method (ALGO_1) I search over elements of <background> and check the value H_NAME equals a value entered in the main. When I attempt to run the code, I get a null pointer exception. U[详细]

2022-12-23 06:56 分类：问答
有北京本地人没，请问协和医院能做第三代试管婴儿吗？？

我老婆之前停过两次胎，后来去医院检查染色体。报告显示我的8号和22号平衡易位。目前，医生建议我们最好做第三代试管婴儿，它可以开发者_C百科有效地保护胎儿免受染色体异常。然后我们打算在北京做。在这里想问一下[详细]

2022-12-21 20:00 分类：问答
How to check if an object is an instance of a namedtuple?

How do I check if an object is an instance of a Named tupl开发者_如何学Ce?Calling the function collections.namedtuple gives you a new type that\'s a subclass of tuple (and no other classes) with a mem[详细]

2022-12-19 02:45 分类：问答