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Classes and Objects In Python
●
Shafeeque
●
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●
www.facebook.com/shafeequemonp pambodan
●
twitter.com/shafeequemonp
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●
9809611325

What is a Class?
 A class is simply a representation of a type of object.
 It is the blueprint/ plan/ template that describe the details of an object.
 A class is the blueprint from which the individual objects are created.
 Class is composed of three things: a name, attributes, and operations.
i.e. it can be executed from as many different points in Program as required
What is an Object?
● An object represents a particular instance of a class.
● An Object is a collection of data members and associated member
functions also known as methods.

Class declaration:
Syntax:
Cpp:
class class_name {};
class class_name {
access_specifier_1://public/private/protected
member1;//member variables//member functions
access_specifier_2:
member2;
...
} object_names;
Class definition:
Eg:class
CRectangle {
int x, y;
public:
void
set_values
(int,int);
int area
(void);
}
Class object:
class_name object_name
Eg:CRectangle rect;
rect.x;or rect.set_values();

Class declaration:
java:
class class_name {}
public class Dog
{
String breed;
int age;
String color;
void barking()
{
}
void hungry()
{
}
void sleeping()
{
}
}
Class object:
Dog dog=new Dog();
Using object:
objectReference.methodName(); Here, dog.barking();
dog.hungry();

Python classes and objects:
Creating Classes:
Syntax:
class ClassName:
'Optional class documentation string'
class_suite
● The class has a documentation string which can be access
via ClassName.__doc__.
● The class_suite consists of all the component statements, defining class
members, data attributes, and functions.
Creating and accessing instance objects:
● To create instances of a class, you call the class using class
name and pass in whatever arguments its __init__ method
accepts
● Object name=Class_name()
● Eg:class=Class() accessing:objectname.method()

class Employee:
'Common base class for all employees'
def __init__(self, name, salary):
self.name = name
self.salary = salary
def displayEmployee(self):
print "Name : ", self.name, ", Salary: ",
self.salary
"This would create first object of Employee class"
emp1 = Employee("shafeeque", 2000)
"This would create second object of Employee class"
emp2 = Employee("shameer", 5000)
emp1.displayEmployee()
emp2.displayEmployee()
Name : shafeeque ,Salary: 2000
Name : shameer ,Salary: 5000

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