This subchapter will be only interesting for C++ and Java programmers who want to know how overloading can be accomplished in Python.
#Class inheritance python plus#
say_hi should return the text from the Robot class version plus the text " and I am a physician!" To demonstrate this, we will write a new version of the PhysicianRobot. When we override a method, we sometimes want to reuse the method of the parent class and at some new stuff. Cars, Buses and Trucks and Bikes can be implemented as subclasses which will inherit these methods from vehicle. We could implement a vehicle class in Python, which might have methods like accelerate and brake. Pick-ups, vans, sports cars, convertibles and estate cars are all cars and by being cars they are vehicles as well. Bikes, cars, buses and trucks are vehicles. It's similar to relationships or categorizations that we know from real life. There exists a hierarchical relationship between classes. Superclasses are sometimes called ancestors as well. A class which inherits from a superclass is called a subclass, also called heir class or child class. The class from which a class inherits is called the parent or superclass. The relationships of objects or classes through inheritance give rise to a directed graph.
#Class inheritance python software#
The methods or generally speaking the software inherited by a subclass is considered to be reused in the subclass.
#Class inheritance python code#
This means that inheritance supports code reusability. Inheritance allows programmers to create classes that are built upon existing classes, and this enables a class created through inheritance to inherit the attributes and methods of the parent class. In most class-based object-oriented languages, an object created through inheritance (a "child object") acquires all, - though there are exceptions in some programming languages, - of the properties and behaviors of the parent object. By doing this, we get a hierarchy of classes. Generally speaking, inheritance is the mechanism of deriving new classes from existing ones.
Python not only supports inheritance but multiple inheritance as well. Inheritance was invented in 1969 for Simula. No object-oriented programming language would be worthy to look at or use, if it didn't support inheritance. On this page ➤ Introduction and Definitions
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