58. Length of Last Word

考察split，分割string，如果string长度为0，直接返回0，如果>0，则返回最后一个单词。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.Example:Input: "Hello World"
Output: 5

class Solution:
def lengthOfLastWord(self, s):
"""
:type s: str
:rtype: int
"""
numS = s.split()
if len(numS) == 0:
return 0
else:
return len(numS[-1])