58. Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example, 
Given s = "Hello World",

return 5.

翻译：求最后一个单词的长度，如果空串，返回零

class Solution(object):    def lengthOfLastWord(self, s):        if s.strip() == '':            return 0        else:            AllWord = s.split()            return (len(AllWord[-1]))