code: def __init__(self):
      super(Nested_VGG, self).__init__()
      self.vgg1 = tl.models.vgg16()
      self.vgg2 = tl.models.vgg16()
  
imports: import os
  import unittest
  import numpy
  import tensorflow
  import tensorlayer
  from tensorlayer.layers import *
  from tensorlayer.models import *
  from tests.utils import CustomTestCase
label_desc: Use image node_id 1 to create a new Nested_VGG object from inherited base classes: Model with example: obj = Nested_VGG()