code: def __init__(self, src, dst, label):
      self.src = src
      self.dst = dst
      self.label = label
  
file_path: dgl/examples/pytorch/eges/utils.py
imports: import argparse
  import random
  from datetime import datetime
  import dgl
  import networkx
  import numpy
  import torch
label_desc: Use image node_id 1 to create a new TestEdge object  with example: obj = TestEdge(src, dst, label)