Largest 5 digit number in a series

def solution(digits):
    max_5_digit = 0 
    for k in range(len(digits)):
        cur_5_digit = int(digits[k:k+5])
        if cur_5_digit > max_5_digit:
            max_5_digit = cur_5_digit
    return max_5_digit

简写

def solution(digits):
    return max((digits[k:k+5]) for k in range(len(digits)-4))