class_docstr: This class is used to add vertex degree based node features to graphs.
  This is usually used to preprocess the graph datasets that do not have
  node features.
code: def __init__(self, dataset, in_degree=False):
      self.max_degree = None
      self.mean = None
      self.std = None
      self.in_degree = in_degree
      self._statistic(dataset)
  
imports: import random
  import torch
  import torch.nn.functional
  from torch.utils.data import Dataset
  from torch_geometric.utils import degree
label_desc: Use image node_id 1 to create a new DegreeTrans object from inherited base classes: object with example: obj = DegreeTrans(dataset, in_degree)