from typing import List, Tuple, Callable
from collections import Counter
class PasswordTooShort(Exception):
 pass
class PasswordTooLong(Exception):
 pass
class NoLowercaseCharacter(Exception):
 pass
class NoUppercaseCharacter(Exception):
 pass
class NoSpecialCharacter(Exception):
 pass
class UnacceptableSpecialCharacter(Exception):
 pass
class TooMuchRepetition(Exception):
 pass
def _check_repetition(password: str, max_repetition: int) -> bool:
 count = Counter(password)
 return any(_ > max_repetition for _ in count.values())
def validate_password(password: str) -> None:
 checks: List[Tuple[Callable[[str], bool], Exception]] = [
 (lambda pwd: len(pwd) < 8, PasswordTooShort("Password is too short.")),
 (lambda pwd: len(pwd) > 20, PasswordTooLong("Password is too long.")),
 (
 lambda pwd: not any(c.islower() for c in pwd),
 NoLowercaseCharacter("Password has no lowercase characters."),
 ),
 (
 lambda pwd: not any(c.isupper() for c in pwd),
 NoUppercaseCharacter("Password has no uppercase characters."),
 ),
 (
 lambda pwd: not any(c in "1234567890" for c in pwd),
 NoSpecialCharacter("Password has no acceptable special characters."),
 ),
 (
 lambda pwd: any(c in ",~@" for c in pwd),
 UnacceptableSpecialCharacter(
 "Password has unacceptable special characters."
 ),
 ),
 (
 lambda pwd: _check_repetition(pwd, 2),
 TooMuchRepetition("Password has too much repetition."),
 ),
 ]
 errors = [error for predicate, error in checks if predicate(password)]
 if errors:
 raise ExceptionGroup("Password Validation Errors", errors)
if __name__ == "__main__":
 try:
 validate_password("passssw~rd1")
 except ExceptionGroup as e:
 for exception in e.exceptions:
 print(exception)