code: def skip(self, chars=spaceCharactersBytes):
          
          p = self.position               # use property for the error-checking
          while p < len(self):
              c = self[p:p + 1]
              if c not in chars:
                  self._position = p
                  return c
              p += 1
          self._position = p
          return None
docs: Skip past a list of characters