class method: oop python

#This program below prints the employee name, salary and role. The program uses class and object programing style. 

#we also want to print the number of leaves that is allowed for each employee. 

#code:  

class Employee:
    no_of_leaves = 8

    def __init__(self, aname, asalary, arole):
        self.name = aname
        self.salary = asalary
        self.role = arole

    def printdetails(self):
        return f"The Name is {self.name}. Salary is {self.salary} and role is {self.role}"

harry= Employee("harry", "230", "teacher")
rohan= Employee("rohan", "333", "dancer")

 

harry= Employee("harry", "230", "teacher")
harry.printdetails()

print(harry.no_of_leaves)

 

 

#cls is the class of the instance that I am working with. 

 

#Now we want to write a program where we can change the number of leaves using just one simple line of code.  # for this we want to use the @classmethod

class Employee:
    no_of_leaves = 8

    def __init__(self, aname, asalary, arole):
        self.name = aname
        self.salary = asalary
        self.role = arole

    def printdetails(self):
        return f"The Name is {self.name}. Salary is {self.salary} and role is {self.role}"
    
    
    @classmethod
    def change_leaves(cls, newleaves):
        cls.no_of_leaves = newleaves

                    #this also changes the class attributes value for the no_of_leaves.
    
    
    
harry= Employee("harry", "230", "teacher")
rohan= Employee("rohan", "333", "dancer")

# Employee.no_of_leaves = 89 #changing the value of no_of_leaves in the class Employee. 

harry.change_leaves(54)
rohan.change_leaves(77)

print(harry.no_of_leaves)
print(rohan.no_of_leaves) 

 
#this also changes the class attributes value for the no_of_leaves. so whenever you use the command rohan.change_leaves(77), you will see this will change the value for harry.change_leaves() as well.