Since potentially everything is sync code and blocks the eventloop, maybe ensure_future does things the right way

Author: Golf Player

nbclient/util.py

@@ -94,5 +94,9 @@ async def ensure_async(obj):
 def run_hook(hook, *args):
     if hook is None:
         return
-    loop = asyncio.get_event_loop()
-    loop.call_soon(hook, *args)
+    if inspect.isawaitable(hook):
+        loop = asyncio.get_event_loop()
+        future = loop.run_in_executor(None, hook, *args)
+    else:
+        future = hook(*args)
+    asyncio.ensure_future(future)