code: def __init__(self, hr_channels, backbone_channels):
      super().__init__()
  
      self.lr_branch = LRBranch(backbone_channels)
      self.hr_branch = HRBranch(hr_channels, backbone_channels)
      self.f_branch = FusionBranch(hr_channels, backbone_channels)
      self.init_weight()
  
imports: from collections import defaultdict
  import paddle
  import paddle.nn
  import paddle.nn.functional
  import numpy
  import scipy
  import paddleseg
  from paddleseg.models import layers, losses
  from paddleseg import utils
  from paddleseg.cvlibs import manager, param_init
label_desc: Use image node_id 1 to create a new MODNetHead object from inherited base classes: nn with example: obj = MODNetHead(hr_channels, backbone_channels)