Максим Алюков

Максимальная длина URL в его адресной строке составляет 2048 символов

url(r"^(?P<MyStrangeVariable>\d+)/$", MyStrangeCode.as_view()),

YEAR_HOLIDAYS = 'HOLIDAYS:{year}' 

   ...
    @classmethod
    def is_work_day(cls, date):
        if date.weekday() in [5,6]:
            return False
        holidays = cache.get(YEAR_HOLIDAYS.format(year=date.year))
        if not holidays:
            holidays = cls.objects.filter(year=date.year).values_list('date', flat=True)
            cache.set(YEAR_HOLIDAYS.format(year=date.year), holidays)
        if date in holidays:
            return False
        return True

def slugify(value, allow_unicode=False):
    """
    Convert to ASCII if 'allow_unicode' is False. Convert spaces to hyphens.
    Remove characters that aren't alphanumerics, underscores, or hyphens.
    Convert to lowercase. Also strip leading and trailing whitespace.
    """

In [1]: unicodedata.normalize('NFKD', 'привет world')                                                                                                                                          
Out[1]: 'привет world'

In [2]: 'привет world'.encode('ascii', 'ignore').decode('ascii')                                                                                                                               
Out[2]: ' world'

In [3]: my_string = 'привет world'.translate(
  str.maketrans(
    "абвгдеёжзийклмнопрстуфхцчшщъыьэюяАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ",
    "abvgdeejzijklmnoprstufhzcss_y_euaABVGDEEJZIJKLMNOPRSTUFHZCSS_
    ...: Y_EUA"
))                                                                                                                                                                               

In [4]: slugify(my_string)                                                                                                                                                                     
Out[4]: 'privet-world'