code: def __init__(self, norm_dict):
      super(GCNLayer, self).__init__()
  
      # norm
      self.norm_dict = norm_dict
  
file_path: cornac/cornac/models/lightgcn/lightgcn.py
imports: import torch
  import torch.nn
  import torch.nn.functional
  import dgl
  import dgl.function
label_desc: Use image node_id 1 to create a new GCNLayer object from inherited base classes: nn with example: obj = GCNLayer(norm_dict)