16  Class vs Instance Method

From: This stackoverflow

class Date(object):
    
    def __init__(self, day=0, month=0, year=0):
        self.day = day
        self.month = month
        self.year = year
    
    def __repr__(self) -> str:
        return f"Date({self.day}, {self.month}, {self.year})"

    @classmethod
    def from_string(cls, date_as_string):
        day, month, year = map(int, date_as_string.split('-'))
        date1 = cls(day, month, year)
        return date1
    
    @classmethod
    def millenium(cls, month, day):
        return cls(month, day, 2000)

    @staticmethod
    def is_date_valid(date_as_string):
        day, month, year = map(int, date_as_string.split('-'))
        return day <= 31 and month <= 12 and year <= 3999

date1 = Date.from_string('11-09-2012')
date1

Date(11, 9, 2012)

date2 = Date.is_date_valid('11-09-2012')
date2

True