标签：appear each rate val 条件 UNC case ict ret
We are given two sentences A and B. (A sentence is a string of space separated words. Each word consists only of lowercase letters.)
A word is uncommon if it appears exactly once in one of the sentences, and does not appear in the other sentence.
Return a list of all uncommon words.
You may return the list in any order.
给定两个句子，每个句子是一个由空格隔开的词组成的字符串，每个词只含小写字母。一个词是uncommon的条件是它仅在一个句子中出现一次。最后返回所有的uncommon的词。可以建一个dict，将词作为key，出现的次数为value。最后uncommon的词即为value为1的词。
class Solution:
def uncommonFromSentences(self, A: ‘str‘, B: ‘str‘) -> ‘List[str]‘:
a = A.split()
b = B.split()
c = {}
a.extend(b)
for e in a:
if e not in c:
c[e] = 1
else:
c[e] += 1
return [key for key, value in c.items() if value == 1]
LeetCode 884 Uncommon Words from Two Sentences 解题报告
标签：appear each rate val 条件 UNC case ict ret
原文地址：https://www.cnblogs.com/yao1996/p/10416601.html
