In Python, a class is an outline that describes the data stored in an object and defines the operations that can be performed on the object. In this article, I’ll show you some examples of classes with Python.
What are Classes in Python?
Python, like all object-oriented programming languages, allows programmers to define their classes. A class definition is an instruction composed of a header and a body. The class header contains the class keyword followed by an identifier used to name the class.
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The body of the class definition contains one or more method definitions, all of which must be indented to the same level of indentation. Suppose we want to define a class to represent a point or coordinate in the two-dimensional Cartesian coordinate system.
The objects will need to store two values, one for the x coordinate and one for the y coordinate. We will also have to decide what operations we want to be able to perform on the objects created from the new class.
Classes Examples with Python
In this section, I will take you through 4 examples of classes with Python:
class car(object):
def __init__(self,name,model,year,condition,kilometers):
self.name=name
self.model=model
self.year=year
self.condition=condition
self.kilometers=kilometers
def display(self,showAll):
if showAll:
print("This car is a",self.name,self.model,"from",self.year,"it is",self.condition,"and has",self.kilometers, "KM highest speed")
else:
print("This car is a",self.name,self.model,"from",self.year)
whip=car("BMW","M5",2019,"New",300)
whip.display(True)This car is a BMW M5 from 2019 it is New and has 300 KM highest speed.
class Employees:
def __init__(self,emp_id,emp_name,emp_salary):
self.emp_id=emp_id
self.emp_name=emp_name
self.emp_salary=emp_salary
def __repr__(self):
return repr((self.emp_id,self.emp_name,self.emp_salary))
emp1=Employees("Emp101","AMAN",100000)
print(emp1)
emp2=Employees("Emp102","ASHISH",58000)
print(emp2)
emp3=Employees("Emp103","ANKIT",34000)
print(emp3)
emp4=Employees("Emp104","AKASH",90000)
print(Employees)(‘Emp101’, ‘AMAN’, 100000)
(‘Emp102’, ‘ASHISH’, 58000)
(‘Emp103’, ‘ANKIT’, 34000)
class father: def __init__(self): super().__init__() self.f_age=39 class son: def __init__(self): super().__init__() self.s_age=5 class family(father,son): def __init__(self): super().__init__() f=family() print(f.f_age,f.s_age)
39 5
class Person: #start a class
def __init__(self, name, job=None, pay=0): # Constructor takes three arguments
self.name = name # Fill out fields when created
self.job = job # self is the new instance object
self.pay = pay
def lastname(self):
return self.name.split()[-1]
def giveraise(self, percent):
self.pay = int(self.pay * (1 + percent))
def __repr__(self): # Added method
return '[Person:%s, %s]'% (self.name, self.pay) #String to print
class Manager(Person):
def giveraise(self, percent, bonus=.10):
Person.giveraise(self, percent + bonus)
if __name__ == '__main__':
john = Person("John Cena")
aman = Person("Aman Kharwal", job='Programmer', pay=500000)
print(aman)
print(john)
print(john.lastname(), aman.lastname())
aman.giveraise(.10)
print(aman)
alex = Manager("Alex Hales", "Manager", 40000)
alex.giveraise(.10)
print(alex.lastname())
print(alex)[Person:Aman Kharwal, 500000]
Cena Kharwal
[Person:Aman Kharwal, 550000]
Hales
[Person:Alex Hales, 48000]
I hope you liked this article on Classes with Python. Feel free to ask your valuable questions in the comments section below.
