389. Find the Difference 用list的方法strip()隔断字符串判断list长度来确定差别字符

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Given two strings s and t which consist of only lowercase letters.

String t is generated by random shuffling string s and then add one more letter at a random position.

Find the letter that was added in t.

Example:

Input:
s = "abcd"
t = "abcde"

Output:
e

Explanation:
'e' is the letter that was added.

class Solution:
    def findTheDifference(self, s, t):
        """
        :type s: str
        :type t: str
        :rtype: str
        """
        stra='abcdefghijklmnopqrstuvwxyz'
        for c in stra:
            if len(s.split(c))!=len(t.split(c)):
                return c

Reference:

http://www.runoob.com/python3/python3-string-split.html

不知道leetcode怎么了，在set集合的时候报错，但在python IDE可以。

return set(s).symmetric_difference(t)

集合方法：http://www.runoob.com/python3/python3-set.html