code: def test_integration_zero_args(self):
      lambda_callback = LambdaCallback()
  
      train_generator = some_data_tensor_generator(
          LambdaTest.batch_size
      )
      valid_generator = some_data_tensor_generator(
          LambdaTest.batch_size
      )
      test_generator = some_data_tensor_generator(LambdaTest.batch_size)
      self.model.fit_generator(
          train_generator,
          valid_generator,
          epochs=LambdaTest.epochs,
          steps_per_epoch=LambdaTest.steps_per_epoch,
          validation_steps=LambdaTest.steps_per_epoch,
          callbacks=[lambda_callback],
      )
  
      num_steps = 10
      self.model.evaluate_generator(
          test_generator, steps=num_steps, callbacks=[lambda_callback]
      )
  
file_path: poutyne/tests/framework/callbacks/test_lambda.py
imports: from unittest.mock import Mock, call
  import torch
  import torch.nn
  from poutyne import Callback, LambdaCallback, Model
  from tests.framework.model.base import ModelFittingTestCase
  from tests.framework.tools import some_data_tensor_generator
label_desc: Use image node_id 2 for calling the LambdaTest obj's underlying member method code with example usage: obj.test_integration_zero_args() without return types