Python3 solution
\nclass Solution:\n    def getConcatenation(self, nums: List[int]) -> List[int]:\n        n=len(nums)\n        r=[]\n        for i in range(0,2*n):\n           
```\nclass Solution:\n    def getConcatenation(self, nums: List[int]) -> List[int]:\n        n=len(nums)\n        r=[]\n        for i in range(0,2*n):\n            if i<n:\n                r.append(nums[i])\n            else:\n                r.append(nums[i-n])\n        return r\n```
['Python', 'Python3']