Проверка пароля

class PasswordError(Exception):
    pass
 
 
class LengthError(PasswordError):
    pass
 
 
class LetterError(PasswordError):
    pass
 
 
class DigitError(PasswordError):
    pass
 
 
class SequenceError(PasswordError):
    pass
 
 
st = 0
 
 
def test1(q):
    if len(q) > 8:
        return True
    else:
        return False
 
 
def test2(w):
    if w.upper() == w or w.lower() == w:
        return False
    else:
        return True
 
 
def test3(e):
    w = False
    for i in "1234567890":
        if i in e:
            w = True
    return w
 
 
def test4(r):
    qwe = ['qwertyuiop', 'asdfghjkl', 'zxcvbnm', 'йцукенгшщзхъ', 'фывапролджэё', 'ячсмитьбю']
    for i in range(len(r) - 2):
        if any([r[i:i + 3].lower() in elem for elem in qwe]):
            return False
    return True
 
 
def check_password(password):
    global st
    if not test1(password):
        raise LengthError
    if not test2(password):
        raise LetterError
    if not test3(password):
        raise DigitError
    if not test4(password):
        raise SequenceError
    st = 1
    return 'ok'
 
 
while st == 0:
    password = input()
    try:
        print(check_password(password))
    except KeyboardInterrupt:
        if password == 'Ctrl+Break':
            print('Bye-Bye')
            break
    except Exception as e:
        print(e.__class__.__name__)