One Liner
Python 3\npython\nclass Solution:\n    def separateDigits(self, nums: List[int]) -> List[int]:\n        return [int(d) for n in nums for d in str(n)]\n
**Python 3**\n```python\nclass Solution:\n    def separateDigits(self, nums: List[int]) -> List[int]:\n        return [int(d) for n in nums for d in str(n)]\n```
['Python3']