class_docstr: First four layers from Vgg16.
class_docstr_tok: ["First","four","layers","from","Vgg16","."]
code: def __init__(self):
      super(Vgg16, self).__init__()
      self.conv1_1 = nn.Conv2D(
          3, 64, kernel_size=3, stride=1, padding=1
      )
      self.conv1_2 = nn.Conv2D(
          64, 64, kernel_size=3, stride=1, padding=1
      )
  
      self.conv2_1 = nn.Conv2D(
          64, 128, kernel_size=3, stride=1, padding=1
      )
      self.conv2_2 = nn.Conv2D(
          128, 128, kernel_size=3, stride=1, padding=1
      )
  
      self.conv3_1 = nn.Conv2D(
          128, 256, kernel_size=3, stride=1, padding=1
      )
      self.conv3_2 = nn.Conv2D(
          256, 256, kernel_size=3, stride=1, padding=1
      )
      self.conv3_3 = nn.Conv2D(
          256, 256, kernel_size=3, stride=1, padding=1
      )
  
      self.conv4_1 = nn.Conv2D(
          256, 512, kernel_size=3, stride=1, padding=1
      )
      self.conv4_2 = nn.Conv2D(
          512, 512, kernel_size=3, stride=1, padding=1
      )
      self.conv4_3 = nn.Conv2D(
          512, 512, kernel_size=3, stride=1, padding=1
      )
  
      self.conv5_1 = nn.Conv2D(
          512, 512, kernel_size=3, stride=1, padding=1
      )
      self.conv5_2 = nn.Conv2D(
          512, 512, kernel_size=3, stride=1, padding=1
      )
      self.conv5_3 = nn.Conv2D(
          512, 512, kernel_size=3, stride=1, padding=1
      )
  
      checkpoint = os.path.join(MODULE_HOME, "msgnet", "vgg16.pdparams")
      model_dict = paddle.load(checkpoint)
      self.set_dict(model_dict)
      print("load pretrained vgg16 checkpoint success")
  
imports: import os
  import argparse
  import paddle
  import paddle.nn
  import numpy
  import paddle.nn.functional
  from paddlehub.env import MODULE_HOME
  from paddlehub.module.module import moduleinfo
  from paddlehub.vision.transforms import Compose, Resize, CenterCrop
  from paddlehub.module.cv_module import StyleTransferModule
label_desc: Use image node_id 1 to create a new Vgg16 object from inherited base classes: nn with example: obj = Vgg16()