code: def __init__(self):
      d_name = "ogbl-ppa"
      dataset = LinkPropPredDataset(name=d_name)
      splitted_edge = dataset.get_edge_split()
      graph = dataset[0]
      self.num_nodes = graph["num_nodes"]
      self.ogb_evaluator = Evaluator(name="ogbl-ppa")
  
file_path: PGL/ogb_examples/linkproppred/ogbl-ppa/monitor/train_monitor.py
imports: import tqdm
  import json
  import numpy
  import sys
  import os
  import paddle.fluid
  from pgl.utils.log_writer import LogWriter
  from ogb.linkproppred import Evaluator
  from ogb.linkproppred import LinkPropPredDataset
label_desc: Use image node_id 1 to create a new OgbEvaluator object from inherited base classes: object with example: obj = OgbEvaluator()