code: def __hammingDistance(s1, s2):
          '''
          Finds the Hamming distance between two strings.
  
          @param s1: string
          @param s2: string
          @return: the distance
          @raise ValueError: if the lenght of the strings differ
          '''
  
          l1 = len(s1)
          l2 = len(s2)
  
          if l1 != l2:
              raise ValueError("Hamming distance requires strings of same size.")
  
          return sum(ch1 != ch2 for ch1, ch2 in zip(s1, s2)f __hammingDistance(s1, s2):
          '''
          Finds the Hamming distance between two strings.
  
          @param s1: string
          @param s2: string
          @return: the distance
          @raise ValueError: if the lenght of the strings differ
          '''
  
          l1 = len(s1)
          l2 = len(s2)
  
          if l1 != l2:
              raise ValueError("Hamming distance requires strings of same size.")
  
          return sum(ch1 != ch2 for ch1, ch2 in zip(s1, s2))
docs: Finds the Hamming distance between two strings.
  
          @param s1: string
          @param s2: string
          @return: the distance
          @raise ValueError: if the lenght of the strings differ