Strong Password Checker II — Python

# Time:  O(n)
# Space: O(1)

# string
class Solution(object):
    def strongPasswordCheckerII(self, password):
        """
        :type password: str
        :rtype: bool
        """
        SPECIAL = set("!@#$%^&*()-+")
        return (len(password) >= 8 and
                any(c.islower() for c in password) and
                any(c.isupper() for c in password) and
                any(c.isdigit() for c in password) and
                any(c in SPECIAL for c in password) and
                all(password[i] != password[i+1] for i in xrange(len(password)-1)))