code: def ssn(self, min_age=0, max_age=105, artificial=False):
          
          def _checksum(hetu):
              checksum_characters = "0123456789ABCDEFHJKLMNPRSTUVWXY"
              return checksum_characters[int(hetu) % 31]
  
          age = datetime.timedelta(
              days=self.generator.random.randrange(min_age * 365, max_age * 365))
          birthday = datetime.date.today() - age
          hetu_date = "%02d%02d%s" % (
              birthday.day, birthday.month, str(birthday.year)[-2:])
          range = (900, 999) if artificial is True else (2, 899)
          suffix = str(self.generator.random.randrange(*range)).zfill(3)
          checksum = _checksum(hetu_date + suffix)
          separator = self._get_century_code(birthday.year)
          hetu = "".join([hetu_date, separator, suffix, checksum])
          return hetu
docs: Returns 11 character Finnish personal identity code (Henkilötunnus,
          HETU, Swedish: Personbeteckning). This function assigns random
          gender to person.
  
          HETU consists of eleven characters of the form DDMMYYCZZZQ, where
          DDMMYY is the date of birth, C the century sign, ZZZ the individual
          number and Q the control character (checksum). The sign for the
          century is either + (1800–1899), - (1900–1999), or A (2000–2099).
          The individual number ZZZ is odd for males and even for females.
          For people born in Finland its range is 002-899
          (larger numbers may be used in special cases).
          An example of a valid code is 311280-888Y.
  
          https://en.wikipedia.org/wiki/National_identification_number#Finland