Create a class named Employee and initialize with name and id. Create two methods to return perimeter and area. Create a class named Square and initialize it with length. Create an empty class and an object for the class without raising an error.Īns 1. To demonstrate docstring Interview Questions on Python Classes Abstract classes can have a normal method and an abstract method.Įxample of Abstract Class in Python from abc import ABC, abstractmethod We can create abstract classes by using the abc module.įrom the abc module, we need to import ABC class to inherit and abstractmethod decorator to create abstract methods. A class should contain at least one abstract method to become an abstract class. Like the name suggests, it is only abstract and can not be instantiated.
This blueprint class is called an abstract class.Ībstract class is a template for other classes. When we are creating multiple complex classes, we need to have a blueprint class to create other complex classes. We know classes work like a blueprint to objects.
#Python class code
In the above code example, although both classes have no relationship, we still used the same variable person to call methods of different classes. Print("Instance attributes of van", van._dict_) Print("Instance attributes of car", car._dict_) When we try to change a class attribute using an object name, instead of changing the class attribute, Python creates an instance attribute with the same name as the class attribute and assigns the new value to the instance attribute. Class Attributes vs Instance Attributes Class Attributesĭot operator and self parameter are not needed.ĭot operator and self parameter are needed to declare instance attributes.Ĭan be accessed with the class name and object name.Ĭhanging Class Attributes to Instance Attributes These attributes can only be accessed by the object name. In the above code example, each object’s attributes have unique values. To access methodsĮxample of Python Dot Operator class Vehicle:
In python, the dot operator is used to access variables and functions which are inside the class. We will learn about attributes and methods in the coming sections. We implement behavior by creating methods in the class.Įxample: Accelerating and breaking in a car. Behaviour of an object is what the object does with its attributes. We give each object its unique state by creating attributes in the _init_method of the class.Įxample: Number of doors and seats in a car.ģ. In Python, every object has its unique state. In Python, objects consist of state, behavior, and identity.Ģ. This is also called object Instantiation. In the above code example, we’ve created an object car from the class Vehicle.
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