Merge 3.5 (issue #28613)

Lib/asyncio/events.py

@@ -6,6 +6,7 @@ __all__ = ['AbstractEventLoopPolicy',
            'get_event_loop_policy', 'set_event_loop_policy',
            'get_event_loop', 'set_event_loop', 'new_event_loop',
            'get_child_watcher', 'set_child_watcher',
+           '_set_running_loop', '_get_running_loop',
            ]
 
 import functools

Lib/test/test_asyncio/test_events.py

@@ -2732,9 +2732,11 @@ class PolicyTests(unittest.TestCase):
         try:
             asyncio.set_event_loop_policy(Policy())
             loop = asyncio.new_event_loop()
+            self.assertIs(asyncio._get_running_loop(), None)
 
             async def func():
                 self.assertIs(asyncio.get_event_loop(), loop)
+                self.assertIs(asyncio._get_running_loop(), loop)
 
             loop.run_until_complete(func())
         finally:
@@ -2742,6 +2744,8 @@ class PolicyTests(unittest.TestCase):
             if loop is not None:
                 loop.close()
 
+        self.assertIs(asyncio._get_running_loop(), None)
+
 
 if __name__ == '__main__':
     unittest.main()