code: def setUp(self):
      torch.manual_seed(42)
      self.pytorch_network = nn.Linear(1, 1)
      self.loss_function = nn.MSELoss()
  
file_path: poutyne/tests/framework/model/test_model_optimizer.py
imports: import unittest
  import torch
  import torch.nn
  import torch.optim
  from poutyne import Model
label_desc: Use image node_id 1 for calling the ModelOptimizerInstanciationTest obj's underlying member method code with example usage: obj.setUp() without return types