new_contents: class Solution(object):
      def isOneBitCharacter(self, bits):
          """
          :type bits: List[int]
          :rtype: bool
          """
          s0, s1 = True, False
          for i, b in enumerate(bits[:-1]):
              if b == 1:
                  s0, s1 = s1 and bits[i - 1] == 1, s0
              else:
                  s0, s1 = True, False
          return s0
  
  
subject: Add py solution for 717. 1-bit and 2-bit Characters