abstract class and abstract method in python
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tutorial: abstract class and abstract method in python
in object-oriented programming, an abstract class is a class that cannot be instantiated on its own and is designed to be subclassed. abstract classes are used to define a blueprint for other classes, enforcing certain methods to be implemented by its subclasses. abstract methods are methods declared in an abstract class, but they do not contain an implementation.
1. abstract class:
an abstract class in python is created using the abc module, which stands for abstract base classes. abstract classes are defined using the abc class and the abstractmethod decorator. here's how to create an abstract class in python:
in this example, animal is an abstract class with one abstract method make_sound(). any class that inherits from animal must implement the make_sound() method, or it will raise an error.
2. abstract method:
an abstract method is a method declared in an abstract class but does not contain an implementation. it only serves as a placeholder for the method that must be implemented by the subclasses. here's how to define an abstract method using the abstractmethod decorator:
in this example, dog and cat are subclasses of the animal abstract class. both subclasses implement the make_sound() method, as required by the abstract class.
3. using abstract class and abstract method:
now, let's see how to use the abstract class and abstract method in our code:
in this code, we create instances of the dog and cat classes and call their make_sound() methods. since both classes have implemented the abstract method make_sound(), they produce the expected output.
benefits of abstract classes and abstract methods:
conclusion:
in python, abstract classes and abstract methods provide a way to define a blueprint for classes and enforce certain methods to be implemented by subclasses. they are useful for creating a consistent interface among classes and ensuring adherence to a certain design pattern.
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