class and object are basic concept in object-oriented programming languages.a class is a collection of functions and variables, class is written by a programmer and should followed by a standard structure. object is simple an instance of a class.In this article we are going elaborate Python class and object tutorial with example.class in python is created by the keyword class.
So now we know the basic of a class,still wondering why we are using it and what are the advantages of class in python.
advantages of class in python
- Re-usability
- Data Redundancy
- Security
- Code Maintenance
- Design Benefits. etc
Python class syntax
class Name_of_the_class:
# Statement-1
.
.
.
# Statement-N
Python class and object tutorial with example code
class calculator:
@staticmethod
def sum(a, b):
return a + b
@staticmethod
def multip(a, b):
return a * b
@staticmethod
def div(a,b):
return b / a
cal= calculator()
print(cal.sum(2,3))
print(cal.multip(2,3))
print(cal.div(2,3))
Output
5
6
1.5
Object of class in python
We know that object is an instance of a class, in simple Object of class in python is the copy of a class with actual values in it.In the above example cal is the object of the class calculator.we can create n number of object for a single class .example cal1= calculator() is the other instance of the class calculator() like this we can create n object for the class calculator().
__init__ method
__init__ method is a method in python ,it is like exactly like constructor concept in PHP or Java,__init__ is automatically called when an object of that class is created.__init__ method is normally used to initialize the data in a class.
Example of __init__ method in python
class Employee:
# init method or constructor
def __init__(self, employee_id,name):
self.employee_id = employee_id
self.name = name
# Sample Method
def welome_emp(self):
print('Hello, welcome', self.employee_id, 'Your EMployee Id id', self.name)
p = Employee('Anamika','Emp1009')
p.welome_emp()