old_contents: """`Factory` providers deep init injections example."""
  
  from dependency_injector import providers
  
  
  class Regularizer:
      def __init__(self, alpha):
          self.alpha = alpha
  
  
  class Loss:
      def __init__(self, regularizer):
          self.regularizer = regularizer
  
  
  class ClassificationTask:
      def __init__(self, loss):
          self.loss = loss
  
  
  class Algorithm:
      def __init__(self, task):
          self.task = task
  
  
  algorithm_factory = providers.Factory(
      Algorithm,
      task=providers.Factory(
          ClassificationTask,
          loss=providers.Factory(
              Loss,
              regularizer=providers.Factory(
                  Regularizer,
              ),
          ),
      ),
  )
  
  
  if __name__ == '__main__':
      algorithm_1 = algorithm_factory(task__loss__regularizer__alpha=0.5)
      assert algorithm_1.task.loss.regularizer.alpha == 0.5
  
      algorithm_2 = algorithm_factory(task__loss__regularizer__alpha=0.7)
      assert algorithm_2.task.loss.regularizer.alpha == 0.7
  
      algorithm_3 = algorithm_factory(task__loss__regularizer=Regularizer(alpha=0.8))
      assert algorithm_3.task.loss.regularizer.alpha == 0.8
  
new_contents: """`Factory` providers - building a complex object graph with deep init injections example."""
  
  from dependency_injector import providers
  
  
  class Regularizer:
      def __init__(self, alpha):
          self.alpha = alpha
  
  
  class Loss:
      def __init__(self, regularizer):
          self.regularizer = regularizer
  
  
  class ClassificationTask:
      def __init__(self, loss):
          self.loss = loss
  
  
  class Algorithm:
      def __init__(self, task):
          self.task = task
  
  
  algorithm_factory = providers.Factory(
      Algorithm,
      task=providers.Factory(
          ClassificationTask,
          loss=providers.Factory(
              Loss,
              regularizer=providers.Factory(
                  Regularizer,
              ),
          ),
      ),
  )
  
  
  if __name__ == '__main__':
      algorithm_1 = algorithm_factory(task__loss__regularizer__alpha=0.5)
      assert algorithm_1.task.loss.regularizer.alpha == 0.5
  
      algorithm_2 = algorithm_factory(task__loss__regularizer__alpha=0.7)
      assert algorithm_2.task.loss.regularizer.alpha == 0.7
  
      algorithm_3 = algorithm_factory(task__loss__regularizer=Regularizer(alpha=0.8))
      assert algorithm_3.task.loss.regularizer.alpha == 0.8
  
subject: Update the docblock of the example