code: def set_model(self, model):
      self.model = model
  
imports: import torch
  import torch.nn
  from torch.autograd import Variable
  import torch.optim
  import os
  import time
  import sys
  import datetime
  import ctypes
  import json
  import numpy
  from sklearn.metrics import roc_auc_score
  import copy
  from tqdm import tqdm
label_desc: Use image node_id 2 for calling the Tester obj's underlying member method code with example usage: obj.set_model(model) without return types