Page 409 - Computer_Science_F5

Computer Science In Python, the class keyword is used number 12 and the string “Hello, world”
to define and create classes. Attributes
are both objects.
refer to the variables that are associated
An object consists of:
with a particular class. In this scenario,
(a) State: It is represented by the
attributes are always public and can
FOR ONLINE READING ONLY
be accessed using the dot (.) operator.
the properties of an object.
For instance, if we have a class called attributes of an object. It also reflects
MyClass, and it possesses an attribute (b) Behavior: It is represented by the
named MyAttribute, we can access it by methods of an object. It also reflects
using the syntax MyClass.MyAttribute. the response of an object to other
objects.
You can create an empty class, Program (c) Identity: It gives a unique name to
Example 6.1 shows how you can create an object and enables one object to
empty class of Dog, interact with other objects.

Program Example 6.1: To understand the state, behavior,
and identity take the example of the
Creating an empty class in Python class dog that was provided before. In
the context of a dog, the identity can
class Dog: be thought of as the dog’s name.

pass The state or attributes of a dog refer
to characteristics such as its breed,
age, or color. The behavior of a dog
In this example, Dog is a class with encompasses actions like eating or
no attributes or methods. It serves as sleeping.
a blueprint that can be used to create
objects with no initial state or behavior.
Creating class and object in Python
Python objects Classes serve as blueprints for creating

In Python’s object-oriented programming objects, encapsulating both data
paradigm, an object represents an entity (attributes) and behavior (methods). To
that possesses both state and behavior. define a class, use the “class” keyword,
followed by the class name and a colon
These objects can be any real-world item to start the class block.
such as a mouse, keyboard, chair, table,
pen, and so on. Additionally, objects Creating objects (Instances)
can be data types like integers, strings, Objects are instances of classes,
floating-point numbers, arrays, and representing individual entities based on
dictionaries. In fact, even simple entities the class blueprint. To create an object,
like a single integer or a single string instantiate the class by calling the class
are considered objects. For example, the name followed by parentheses.

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Computer Science Form 5.indd 400 23/07/2024 12:34