Class Methods

• Class methods effect the Class i.e. they operate on Class attributes.

class Mobile:
    # class attribute
    count = 0

    def __init__(self, model, manufacturer):
        # instance attribute
        self.model = model
        self.manufacturer = manufacturer
        Mobile.count += 1

    def dail(self, number):
        # instance
        print(f"dailing from {self.model} to {number}")

    @classmethod
    def count_info(cls):
        print(cls.count)

iphone = Mobile(model='12 PRO', manufacturer='apple')
iphone.dail('9999999999')
Mobile.count_info()

oneplus = Mobile(model='One plus 9', manufacturer='one plus')
oneplus.dail('888888888')
Mobile.count_info()

### Output

dailing from 12 PRO to 9999999999
1
dailing from One plus 9 to 888888888
2

Static Method

• Static Methods are generally used to write utility functions.
• Static methods affect neither class nor its objects. Its just in there for convenience

class Mobile:
    # class attribute
    count = 0

    def __init__(self, model, manufacturer):
        # instance attribute
        self.model = model
        self.manufacturer = manufacturer
        Mobile.count += 1

    def dail(self, number):
        # instance
        print(f"dailing from {self.model} to {number}")

    @classmethod
    def count_info(cls):
        print(cls.count)

    @staticmethod
    def copyright():
        print(f"Copyright @2021. Any illegal reproduction of this content will result in immediate legal action ")

iphone = Mobile(model='12 PRO', manufacturer='apple')
iphone.dail('9999999999')
Mobile.count_info()

oneplus = Mobile(model='One plus 9', manufacturer='one plus')
oneplus.dail('888888888')
Mobile.count_info()
Mobile.copyright()

Magic Methods

• In python we have lot of magical methods

• Refer Here for the official documentation

• Magical methods for comparison

• Magical Methods for math

• Miscellaneous Magic methods

• Refer Here for the samples created in the Class

Inheritance

• Inherit from Parent Class

class Mobile:
    pass

class SmartMobile(Mobile):
    pass

• We can check the relationship using issubclass

>>> issubclass(SmartMobile, Mobile)
True

• Lets add behaviours to the parent class
• Override the Methods and Magical Methods
• Refer Here for the examples