Python给定一个句子倒序输出单词以及字母

#!/usr/bin/python
# -*- coding: utf-8 -*-
def rever(sentence):
    newwords = []
    words = sentence.split()
    words.reverse()
    space = ' '#单词之间一个间隔
    for word in words:
        newword = []
        new = ''#单词的字母间无间隔
        l = len(word)
        for i in range(l):
            newword.append(word[l-i-1])
        neww = new.join(newword)
        newwords.append(neww)
    print space.join(newwords)
rever('what\'s your problem man ?')

运行结果：

? nam melborp ruoy s'tahw