class_docstr: VGG16 image feature extractor.
code: def __init__(self):
      super(VGG16FeatureExtractor, self).__init__()
      with self.init_scope():
          self.cnn = L.VGG16Layers()
      self.cnn_layer_name = "fc7"
  
imports: import numpy
  import chainer
  from chainer import functions
  from chainer import initializers
  from chainer import links
  from chainer import reporter
  from chainer import Variable
label_desc: Use image node_id 1 to create a new VGG16FeatureExtractor object from inherited base classes: chainer with example: obj = VGG16FeatureExtractor()