old_contents: from threading import Thread
  from Queue import Queue
  
  from doubles import lifecycle
  
  
  class TestLifecycle(object):
      def test_stores_a_space_per_thread(self):
          queue = Queue()
  
          queue.put(lifecycle.current_space())
  
          def push_thread_space_to_queue(queue):
              queue.put(lifecycle.current_space())
  
          thread = Thread(target=push_thread_space_to_queue, args=(queue,))
          thread.start()
          thread.join()
  
          main_space = queue.get()
          thread_space = queue.get()
  
          assert main_space is not thread_space
  
new_contents: from threading import Thread
  from Queue import Queue
  
  from doubles import lifecycle
  
  
  class TestLifecycle(object):
      def test_stores_a_space_per_thread(self):
          queue = Queue()
  
          def push_thread_space_to_queue(queue):
              queue.put(lifecycle.current_space())
  
          push_thread_space_to_queue(queue)
  
          thread = Thread(target=push_thread_space_to_queue, args=(queue,))
          thread.start()
          thread.join()
  
          main_space = queue.get()
          thread_space = queue.get()
  
          assert main_space is not thread_space
  
subject: Reduce minor duplication in lifecycle test.