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.

Example:

Input: "Hello World"
Output: 5

class Solution:
    def lengthOfLastWord(self, s):
        """
        :type s: str
        :rtype: int
        """
        s = s.rstrip() #Python rstrip() 删除 string 字符串末尾的指定字符（默认为空格）.
        if len(s)==0:
            return 0
        else:
            return len(s.split()[-1])