code: def hash(self):
          '''
          :rtype: int
          :return: hash of the container
          '''
          hashed = super(Container, self).hash()
          for f in self._fields:
              f_hashed = f.hash()
              hashed = khash(hashed + f_hashed)
          return hashef hash(self):
          '''
          :rtype: int
          :return: hash of the container
          '''
          hashed = super(Container, self).hash()
          for f in self._fields:
              f_hashed = f.hash()
              hashed = khash(hashed + f_hashed)
          return hashed
docs: :rtype: int
          :return: hash of the container