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:
<b>Input:</b> "Hello World" <b>Output:</b> 5
解法：
class Solution:
def lengthOfLastWord(self, s: 'str') -> 'int':
data=s.strip().split(' ')
if not data:
return 0
else:
return len(data[-1])
