Python-сообщество

import unittest
class Calendar:
    def __init__(self, year, month, day):
        self.year = year
        self.month = month
        self.day = day
    def get_year(self):
        year = self.year
        return year
    def get_month(self):
        month = self.month
        return month
    def get_day(self):
        day = self.day
        return day
date = Calendar(2020, 44, 12)
yyyy = date.get_year()
mm = date.get_month()
dd = date.get_day()
result = str(yyyy) + "-" + str(mm) + "-" +  str(dd)
class Test(unittest.TestCase):
    def is_correct(self):
        if len(yyyy) != 4 and not yyyy.isdigit():
            return False
        elif len(mm) != 1 and not mm.isdigit():
            return False
        elif 31 < len(dd) < 1 and not dd.isdigit():
            return False
        elif (mm == 2 and dd > 28) and ((mm == 4 or 6 or 9 or 11) and dd > 30):
            return False
        else:
            return True
    def test_validation(self):
        self.assertTrue(result.is_correct(), True)
if __name__ == "__main__":
    unittest.main() 

import unittest
class Calendar:
    def get_year(self):
        year = self.year
        return year
    def get_month(self):
        month = self.month
        return month
    def get_day(self):
        day = self.day
        return day
    def is_correct(self):
        if len(str(d.get_year())) != 4 and not str(d.get_year).isdigit():
            return False
        elif len(str(d.get_month())) != 1 and not str(d.get_month()).isdigit():
            return False
        elif 31 < len(str(d.get_day())) < 1 and not str(d.get_day()).isdigit():
            return False
        elif d.get_month == 2 and d.get_day > 28:
            return False
        elif  d.get_month == 4 or 6 or 9 or 11 and d.get_day > 30:
            return False
        else:
            return True
d = Calendar()
class Test(unittest.TestCase):
    def test_validation(self):
        d.year = 2020
        d.month = 7
        d.day = 25
        date = (d.get_year(), d.get_month(), d.get_day())
        self.assertTrue(date.is_correct(), True)
if __name__ == "__main__":
    unittest.main()