text: from py_irt.initializers import DifficultySignInitializer
  from py_irt.dataset import Dataset
  from py_irt.training import IrtModelTrainer
  from py_irt.config import IrtConfig
  
  
  def test_parsing():
      config = IrtConfig(model_type="4pl", initializers=[])
      # This loads the initializer, so is a fine test
      trainer = IrtModelTrainer(data_path="test_fixtures/minitest.jsonlines", config=config)
      assert len(trainer._initializers) == 0
  
      config = IrtConfig(model_type="4pl", initializers=["difficulty_sign"])
      trainer = IrtModelTrainer(data_path="test_fixtures/minitest.jsonlines", config=config)
      assert len(trainer._initializers) == 1
      assert isinstance(trainer._initializers[0], DifficultySignInitializer)
  
      config = IrtConfig(
          model_type="4pl", initializers=[{"name": "difficulty_sign", "magnitude": 5.0}]
      )
      trainer = IrtModelTrainer(data_path="test_fixtures/minitest.jsonlines", config=config)
      assert len(trainer._initializers) == 1
      assert isinstance(trainer._initializers[0], DifficultySignInitializer)
      assert trainer._initializers[0]._magnitude == 5.0
  