text: """
  abstract backend class
  """
  
  
  # pylint: disable=unused-argument,missing-docstring
  
  class Backend():
      def __init__(self):
          self.inputs = []
          self.outputs = []
  
      def version(self):
          raise NotImplementedError("Backend:version")
  
      def name(self):
          raise NotImplementedError("Backend:name")
  
      def load(self, model_path, inputs=None, outputs=None):
          raise NotImplementedError("Backend:load")
  