text: # pylint: disable=R0903,W0232
  """check for scope problems"""
  
  __revision__ = None
  
  class Well(object):
      """well"""
      class Data(object):
          """base hidden class"""
      class Sub(Data):
          """whaou, is Data found???"""
          attr = Data()
      def func(self):
          """check Sub is not defined here"""
          return Sub(), self
  