Сервисы вопросники вроде TheQuestion и Яндекс.Кью не слишком честно обращаются с экспертами. Вот ты регистрируешься как, например, программист. Тебе там сразу рассказывают о том, как много людей ждёт именно твоих ответов на их вопросы. «Наконец-то я смогу поделиться своими знаниями с миром!» — думаешь ты.
На деле большинство вопросов (по крайней мере по программированию) делятся на два вида:
1. Какая-то абсолютно невежественная дичь, типа «Как взломать QR код с помощью логарифмов?»
2. Вопрос связанный с очень узкой конкретной задачей на конкретных данных спрашивающего. Всё бы хорошо, но чаще всего вопрос сформулирован очень плохо, потому что это чьё-то домашнее задание или студенческая работа. Нередко спрашивающий хочет сойти за умного и просто нагромождает термины без нужного контекста, типа «Как обрезать дерево решений?» (и всё, больше никаких подробностей в вопросе).
В итоге настоящего «Поделиться знаниями» так и не происходит. Я вот получил ещё в прошлом году статус эксперта на Кью, и забил. Вопросы очень скучные.
#web
https://docs.python.org/3/library/functions.html#classmethod
classmethod(function)
Return a class method for function.
A #class method receives the class as implicit first argument, just like an instance method receives the instance. To declare a class method, use this idiom:
class C:
@classmethod
def f(cls, arg1, arg2, ...): ...
The @classmethod form is a function decorator – see the description of function definitions in Function definitions for details.
It can be called either on the class (such as C.f()) or on an instance (such as C().f()). The instance is ignored except for its class. If a class method is called for a derived class, the derived class object is passed as the implied first argument.
Class methods are different than C++ or Java static methods. If you want those, see staticmethod() in this section.
For more information on class methods, consult the documentation on the standard type hierarchy in The standard type hierarchy.
🧠"Zamonaviy dizayn" kursida biznes savodxonligi va tadbirkorlik ko‘nikmalari
🏛 Biznes va tadbirkorlik oliy maktabi hamda Xalqaro inklyuziv hab hamkorligida “Zamonaviy dizayn” kursiga “Biznes savodxonligi” fani qo‘shimcha fakultativ dars sifatida kiritildi.
➕ Dasturda o‘quvchilar nafaqat ijodiy, balki tadbirkorlik va biznes ko‘nikmalarini ham o‘rganadilar. Ular biznes turlari, tashkiliy-huquqiy asoslar, soliq imtiyozlari, xarajatlarni tahlil qilish, tannarxni hisoblash, narxlarni shakllantirish va foydani baholash kabi muhim ko‘nikmalarni egallaydilar. Bu jarayonda Oliy biznes maktab professori D. Rasulova va malakali mutaxassis B. Ishmuxamedov kabi tajribali o‘qituvchilar o‘quvchilarga bilim va tajribalar ulashdilar.
#GSBE#GraduateSchool#Class#Academic#Study
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http://www.wikipython.com/other-concepts/anatomy-of-a-class/
It seems obvious, but note that you must define a class before you use it.
When you create a #class, it establishes its own namespace and all its own local variables (except global definitions) exist only inside that #namespace. They do not interact with other variables of the same name outside it. This leads us to one very important “feature” of classes that you need to know. If you use the same word to designate some specific value both inside and outside the class blueprint, the instance value will take precedence when you try to use that value.
#learn
https://en.wikipedia.org/wiki/Single_responsibility_principle
The #single_responsibility_principle is a computer programming principle that states that every #module or #class should have responsibility over a single part of the functionality provided by the software, and that responsibility should be entirely encapsulated by the class. All its services should be narrowly aligned with that responsibility. Robert C. Martin expresses the principle as, "A class should have only one reason to change."
https://julien.danjou.info/blog/2013/guide-python-static-class-abstract-methods
Mixing #static, #class and #abstract methods
When building classes and inheritances, the time will come where you will have to mix all these methods decorators. So here's some tips about it.
Keep in mind that declaring a method as being abstract, doesn't freeze the prototype of that method. That means that it must be implemented, but it can be implemented with any argument list.