day4.py

import re


def NewType(name, base=object):
    class _NewType(base):
        pass

    _NewType.__name__ = name
    return _NewType


PswdExc = NewType("PswdExc", Exception)
NoDouble = NewType("NoDouble", PswdExc)
TooManyDigits = NewType("TooManyDigits", PswdExc)
DecrDigit = NewType("DecrDigit", PswdExc)


def main():
    print(len(list(find_passwords(168630, 718098))))


def test():
    _check_password("111111")
    _check_password("112233")
    _check_password("223450")
    _check_password("123789")


def _check_password(pswd):
    try:
        check_password(pswd)
        print(True)
    except PswdExc as e:
        print(type(e).__name__)


def find_passwords(r_min, r_max):
    for i in map(str, range(r_min, r_max + 1)):
        try:
            check_password(i)
        except PswdExc:
            pass
        else:
            yield i


def check_password(pswd):
    m = re.findall(r'((\d)\2+)', pswd)
    if not m:
        raise NoDouble()

    for i in m:
        if len(i[0]) == 2:
            break
    else:
        raise TooManyDigits()

    min_digit = 0
    for digit in map(int, pswd):
        if digit < min_digit:
            raise DecrDigit()
        min_digit = digit