Проверка regexp для объяснения пароля объяснена
r'^
(?=.*[A-Z]) // should contain at least one upper case
(?=.*[a-z]) // should contain at least one lower case
(?=.*?[0-9]) // should contain at least one digit
(?=.*?[!@#\$&*~]) // should contain at least one Special character
.{8,} // Must be at least 8 characters in length
$
Difficult Dugong