code: def add_zeros(data):
      data.x = torch.zeros(data.num_nodes, dtype=torch.long)
      return data
  
file_path: ogb/examples/graphproppred/ppa/main_pyg.py
imports: import torch
  from torch_geometric.loader import DataLoader
  import torch.optim
  import torch.nn.functional
  from gnn import GNN
  from tqdm.auto import tqdm
  import argparse
  import time
  import numpy
  from ogb.graphproppred import PygGraphPropPredDataset, Evaluator
label_desc: Use image node_id 3 for calling a global function with example usage: add_zeros(data) and returns: data