class_docstr: A test NNOperator with no functionality.
code: def __init__(self, framework: str = "pytorch"):
      super().__init__()
      self._framework = framework
  
imports: from towhee.operator import NNOperator
  from towhee.utils.log import engine_log
label_desc: Use image node_id 1 to create a new TestNNOperator object from inherited base classes: NNOperator with example: obj = TestNNOperator(framework)