Abc python stackoverflow

Python has a module called abc (abstract base class ) that offers the necessary tools for crafting an abstract base class. First and foremost, you should understand the ABCMeta metaclass provided by the abstract base class. The rule is every abstract class must use ABCMeta metaclass.29 Ağu 2020

ABCs provide a formal way to define interfaces in Python, while staying true to the spirit of duck-typing . Besides, this works in a way that honours the Open-Closed Principle.

abc. abstractmethod(function) A decorator indicating abstract methods . Using this decorator requires that the class’s metaclass is ABCMeta or is derived from it. A class that has a metaclass derived from ABCMeta cannot be instantiated unless all of its abstract methods and properties are overridden.

When we want to provide a common interface for different implementations of a component , we use an abstract class. Why use Abstract Base Classes : By defining an abstract base class, you can define a common Application Program Interface(API) for a set of subclasses.