code: def __call__(self, class_num=1000, layer_out=None, **configs):
      # build the whole architecture of mobilenet v2 here
      sym = self.build_network(class_num=class_num, **configs)
      if layer_out is None:
          return sym
  
      internals = sym.get_internals()
      if type(layer_out) is list or type(layer_out) is tuple:
          layers_out = [
              internals[layer_nm.strip() + "_output"]
              for layer_nm in layer_out
          ]
          return layers_out
      else:
          layer_out = internals[layer_out.strip() + "_output"]
          return layer_out
  
file_path: byteps/example/mxnet/symbols/mobilenetv2.py
imports: import mxnet
label_desc: Use image node_id 3 for calling the MobileNetV2 obj's underlying member method code with example usage: obj.__call__(class_num, layer_out) and returns: sym, layers_out, layer_out