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CMU Coding Bootcamp
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123456789101112131415def rotateString(s: str, k: int) -> str: """Rotate a string by k positions.""" k %= len(s) return s[k:] + s[:k]
print("Testing rotateString()...", end="")assert rotateString("abcd", 1) == "bcda"assert rotateString("abcd", -1) == "dabc"assert rotateString("efgh", 4) == "efgh"assert rotateString("coffee", 2) == "ffeeco"assert rotateString("112cmu", -3) == "cmu112"assert rotateString("water", -9) == "aterw"print("Passed!")