[Python] Easy to understand/ used dictionary
\nclass Solution:\n    def uncommonFromSentences(self, a: str, b: str) -> List[str]:\n            s1 = a.split(\' \') + b.split(\' \')\n            d = {}\n\n  
```\nclass Solution:\n    def uncommonFromSentences(self, a: str, b: str) -> List[str]:\n            s1 = a.split(\' \') + b.split(\' \')\n            d = {}\n\n            for i in s1:\n              if i in d:\n                d[i] += 1\n              else:\n                d[i] = 1\n\n            res = []\n\n            for i in d:\n              if d[i] == 1:\n                res.append(i)\n            return res\n```
['Python']