Object Oriented Programming

# Class - Template , Blueprints
# Objects - Instances of the class

# DRY - Do Not Repeat Yourself

class Employee:
    no_of_leaves = 8 # class variable

    # Constructer = Use to initialize objects
    def __init__(self,name,salary,role,workinghrs):
        self.name = name
        self.salary = salary
        self.role = role
        self.workinghrs = workinghrs

    # Method
    def printdetails(self):
        return f"The Name is {self.name},Salary is {self.salary},Role is {self.role} and Working Hours are {self.workinghrs}"

emp1 = Employee("EMP1",99999,"Senior Manager",11) # First Object
emp2 = Employee("EMP2",88888,"Manager",12) # Second Object

''' Both the objects have different memory location '''

print(emp1.printdetails())
print(emp2.printdetails())

''' The below method is used when we don't use Construter '''

# # Instance Variables #
# emp1.name = "EMP1"  # You can take any name
# emp1.salary = 99999
# emp1.role = "Senior Manager"
# emp1.workinghrs = 11

# print(emp1.printdetails())

# emp2.name = "EMP2"
# emp2.salary = 88888
# emp2.role = "Manager"
# emp2.workinghrs = 12

# print(emp2.printdetails())

print(emp1.__dict__)  # Returns no. of variables defined with the help of objects

print(Employee.no_of_leaves) # Class variable can be accessed by class

print(emp1.no_of_leaves)  # Class variable can also be accessed by object

Employee.no_of_leaves = 9 # But class variable can be changed only by the class,not by the object

print(Employee.no_of_leaves)

emp1.no_of_leaves = 9
''' If you tried to changed class variable by the object
It will create new instance variable of that object '''

print(emp1.__dict__)