Solution in python for Concatenation of Array

LeetCode/Concatenation-of-Array/python/README.md

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+# How To Start The Project
+
+**This Problem was solved with nodejs, Use the below commands to start the project**
+
+- **For type checking install mypy**
+
+```bash
+    python3 -m pip install mypy
+```
+
+- **To start the project inside the directory (remove the comments)**
+
+```bash
+    mypy solution.py
+    python solution.py
+```

LeetCode/Concatenation-of-Array/python/solution.py

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+from typing import List
+class Solution:
+    def getConcatenation(self, nums: List[int]) -> List[int]:
+        # solution for python 3 and less
+        return nums + nums
+
+"""
+solution = Solution()
+print(solution.getConcatenation([1, 2, 3]))
+"""