Add asyncio.get_running_loop() function. (#4782)

1 files changed, 13 insertions, 1 deletions

diff --git a/Lib/asyncio/events.py b/Lib/asyncio/events.py
index 7db1ded8e8..e425b06e42 100644
--- a/Lib/asyncio/events.py
+++ b/Lib/asyncio/events.py
@@ -7,7 +7,8 @@ __all__ = (
     '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',
+    '_set_running_loop', 'get_running_loop',
+    '_get_running_loop',
 )
 
 import functools
@@ -646,6 +647,17 @@ class _RunningLoop(threading.local):
 _running_loop = _RunningLoop()
 
 
+def get_running_loop():
+    """Return the running event loop.  Raise a RuntimeError if there is none.
+
+    This function is thread-specific.
+    """
+    loop = _get_running_loop()
+    if loop is None:
+        raise RuntimeError('no running event loop')
+    return loop
+
+
 def _get_running_loop():
     """Return the running event loop or None.