document threading.Lock.locked() (GH-17427)

idomic · taleinat · commit fdafa1d0ed0a · 2019-12-01T22:07:39.000+02:00
diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
@@ -496,6 +496,10 @@ All methods are executed atomically.
 
       There is no return value.
 
+   .. method:: locked()
+      Return true if the lock is acquired.
+
+
 
 .. _rlock-objects:
 
