code: def _initialize(self):
          
          self._graph = tf.Graph()
          with self._graph.as_default():
              self._input_node = tf.placeholder(tf.float32, (self._batch_size, self._im_height, self._im_width, self._num_channels))
              weights = self.build_alexnet_weights()
              self._output_tensor = self.build_alexnet(weights)
              self._feature_tensor = self.build_alexnet(weights, output_layer=self._feature_layer)
              self._initialized = True
docs: Open from caffe weights