code: def bitwise_xor(bs0: str, bs1: str) -> str:
      
      if len(bs0) != len(bs1):
          raise ValueError("Bit strings are not of equal length")
      n_bits = len(bs0)
      return PADDED_BINARY_BIT_STRING.format(xor(int(bs0, 2), int(bs1, 2)), n_bits)
docs: A helper to calculate the bitwise XOR of two bit string
  
      :param bs0: String of 0's and 1's representing a number in binary representations
      :param bs1: String of 0's and 1's representing a number in binary representations
      :return: String of 0's and 1's representing the XOR between bs0 and bs1