code: def __init__(self, in_channels, **kwargs):
      super(Kie_backbone, self).__init__()
      self.out_channels = 16
      self.img_feat = UNet()
      self.maxpool = nn.MaxPool2D(kernel_size=7)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import paddle
  from paddle import nn
  import numpy
  import cv2
label_desc: Use image node_id 1 to create a new Kie_backbone object from inherited base classes: nn with example: obj = Kie_backbone(in_channels)