docstr: Evaluator for the PCQM4M dataset
  Metric is Mean Absolute Error
docstr_tok: ["Evaluator","for","the","PCQM4M","dataset","Metric","is","Mean","Absolute","Error"]
code: def __init__(self):
      """
      Evaluator for the PCQM4M dataset
      Metric is Mean Absolute Error
      """
      pass
  
imports: from typing import Optional, Union, Dict
  import os
  import os.path
  import shutil
  from ogb.utils import smiles2graph
  from ogb.utils.url import decide_download, download_url, extract_zip
  import pandas
  import numpy
  from tqdm.auto import tqdm
  import torch
label_desc: Use image node_id 1 to create a new PCQM4MEvaluator object  with example: obj = PCQM4MEvaluator()