code: def test_transform(dummy_evaluator):
      eos = EpochOutputStore(output_transform=lambda x: x[0])
      eos.attach(dummy_evaluator)
  
      dummy_evaluator.run(range(1))
      assert eos.data == [1]
  
file_path: ignite/tests/ignite/handlers/test_stores.py
imports: import pytest
  from ignite.engine.engine import Engine, Events
  from ignite.handlers import EpochOutputStore
label_desc: Use image node_id 4 for calling a global function with example usage: test_transform(dummy_evaluator) without return types