[Python] simple 1 line
\ndef findDifference(self, a: List[int], b: List[int]) -> List[List[int]]:\n        return [set(a)-set(b), set(b)-set(a)]\n
```\ndef findDifference(self, a: List[int], b: List[int]) -> List[List[int]]:\n        return [set(a)-set(b), set(b)-set(a)]\n```
['Python']