code: def __call__(self, data):
      deg = degree(data.edge_index[0], dtype=torch.float)
      deg = (deg - self.mean) / self.std
      data.x = deg.view(-1, 1)
      return data
  
file_path: DIG/dig/auggraph/method/SMixup/utils/utils.py
imports: from torch_geometric.utils import degree
  import torch
label_desc: Use image node_id 2 for calling the NormalizedDegree obj's underlying member method code with example usage: obj.__call__(data) and returns: data