OOps.py

#Object oriented programing
#for this we need use of Class

#Example:

class Number:
    def sum(itself):
        return itself.a+itself.b
num=Number()
num.a=20
num.b=30
s=num.sum()        
print(s)

# Example two

#print form 

class DataBase:
    def info(self):
        print(self.name)
        print(self.place)
        print(self.study)
        print(self.age)
        print(self.bio)
yourdata=DataBase()
yourdata.name="Varinder Brar"
yourdata.place="Nabha"
yourdata.study="Human Behaviour"
yourdata.age="28"
yourdata.bio='Simple to understand and tuff for control'       
yourdata.info()



#Example 3:
#if we want change class attribute
class Employee:
            company="Google"     
            salary="100k"

varinder=Employee()
#varinder.salary="75k"  incase these are not presnt than it will show class attribute it in class you can see and you can make ass much you want
#varinder.fullname="Varinder Brar"
#varinder.campany
print(varinder.company)#here compnay is google
Employee.company="Youtube"
print(varinder.company)#now we change this to youtube 
#print(varinder.fullname)
print(varinder.salary)
#if nothing in class or object than it will through an error


#Self parameter
class Employee:
    company="Google"
    def getSalary(self,signature): #it will give parameter automatically
      print(f"salary is {self.salary} \n {signature}") # this is way how self is usefull for

      @staticmethod
      def greets():
        print("Woo! have a party today")

varinder=Employee()
varinder.salary="100k"
varinder.getSalary("Thanks!") #if you not provide parameter self than you have to write as shown below
#varinder.greets()
#Employee.getSalary(varinder)


## like we want to add signature




  # "__init__()" Constructor

class Data:
    info="names"
    def __init__(self,name,company,role,valueofcampany):
        self.name=name
        self.company=company
        self.role=role
        self.valueofcompany=valueofcampany
        print("Name list is ready")

    def details(self):
        print(f"The name is {self.name}")
        print(f"The company name is {self.company}")        
        print(f"Role in campany as a {self.role}")        
        print(f"The value of campany is {self.valueofcompany}")        


Brar=Data("Varinder Brar","Youngstr","Owner",1000) #without passing arguments you will get error
#Brar.name="Varinder Brar"
#Brar.company="Youngstr"
#Brar.role="Owner"
#Brar.valueofcampany="1000Cr"       
Brar.details()


num=int(input())

class Calculater:

    def __init__(self,num):
        self.number=num

        def sequare(self):
            print(f"Sequare of {self.number} is {self.number**2}")

        def sequareRoot(self):
            print(f"SequareRoot of {self.number} is {self.number**2}")

        def cube(self):
            print(f"Cube of {self.number} is {self.number**0.5}")        

a=Calculater(num)
a.sequare()