code: def main() -> None:
      
      _ = """
      print(twos_comp_to_signed(0, n_bits=32))  # 0
      print(twos_comp_to_signed(2 ** 31 - 1, n_bits=32))  # 2147483647
      print(twos_comp_to_signed(2 ** 31, n_bits=32))  # -2147483648 == -(2 ** 31)
      print(twos_comp_to_signed(2 ** 32 - 1, n_bits=32))  # -1
      print(signed_to_twos_comp(-1, n_bits=32))  # 4294967295 = 2 ** 32 - 1
      print(signed_to_twos_comp(-(2 ** 31), n_bits=32))  # 2147483648 = 2 ** 31 - 1
      """  # noqa
      testdata = [
          "hello",
          1,
          ["bongos", "today"],
      ]
      for data in testdata:
          compare_python_to_reference_murmur3_32(data, seed=0)
          compare_python_to_reference_murmur3_64(data, seed=0)
      print("All OK")
docs: Command-line validation checks.