#OOPs  #Python 

Property Decorators

@property is a built-in decorator in python language which is used to make functions like getters, setters, deleter in a class behave as class properties.

Make a method behaves as attribute/variable

General way - set, get & del using methods

class Vechicle:
    def __init__(self, model):
        self.__model = model

    def get_model(self):
        return self.__model

    def set_model(self, model):
        self.__model = model

    def del_model(self):
        del self.__model

if __name__ == '__main__':
    v1 = Vechicle("Bolero")
    print(v1.get_model())
    v1.set_model('alto')
    print(v1.get_model())
    # v1.del_model()

Use @property to - set, get del - as variable

class Pwskills:
    def __init__(self, course_price):
        self.__course_price = course_price

    @property
    def course_price(self):
        return self.__course_price

    @course_price.setter
    def course_price(self, price):
        self.__course_price = price

    @course_price.deleter
    def course_price(self):
        del self.__course_price

if __name__ == '__main__':
    pw = Pwskills(3500)
    print(pw.course_price)
    pw.course_price = 4300
    print(pw.course_price)
    # del pw.course_price_del

Using property() method to - set, get del - as variable

class Alphabet:
    def __init__(self, value):
        self.__value = value

    def get_value(self):
        return self.__value

    def set_value(self, value):
        self.__value = value

    def del_value(self):
        print('Deleting value')
        del self.__value

    var_value = property(get_value, set_value, del_value)
    
    
if __name__ == '__main__':
    x = Alphabet('GeeksforGeeks')
    print(x.var_value)
    x.var_value = 'GfG'
    print(x.var_value)
    # del x.var_value

Make email from firts + last name

class Employee8:
    def __init__(self, first, last):
        self.first = first
        self.last = last
        # if first or last is changes --> email will not get update
        # self.email = '{}.{}@mail.com'.format(self.first.lower(),
        #                                      self.last.lower())

    # Soln -- using @property
    @property
    def email(self):
        return '{}.{}@mail.com'.format(self.first.lower(),
                                       self.last.lower())

    
if __name__ == '__main__':
    emp1 = Employee8('Amrit', 'Prasad')
    emp2 = Employee8('Puja', 'kumari')
    print(emp1.email) 
    print(emp2.email)

Capitalize name using @property

class Employee:
    def __init__(self, f, l):
        # calling setter
        self.name = f + ' ' +  l

    @property
    def name(self):
        return self.first + ' ' + self.last

    @name.setter
    def name(self, var):
        var1 = var.split()
        self.first = var1[0].capitalize()
        self.last = var1[1].capitalize()
    
if __name__ == '__main__':
    e1 = Employee('amrit', 'Prasad')
    print(e1.__dict__)
    print(e1.first, e1.last)
    print(e1.name)

Reference