Python easy solution
\n    def reverseStr(self, s: str, k: int) -> str:\n        s= list(s)\n        for i in range(0,len(s),2*k):\n            s[i:i+k] = s[i:i+k][::-1]\n        re
\n    def reverseStr(self, s: str, k: int) -> str:\n        s= list(s)\n        for i in range(0,len(s),2*k):\n            s[i:i+k] = s[i:i+k][::-1]\n        return "".join(s)
['Python3']