dont allow repeated patching

jupyter · May 25, 2023 · 8bc645f · 8bc645f
1 parent 2649b72
commit 8bc645f
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/jupyter_core/utils/patched_nest_asyncio.py b/jupyter_core/utils/patched_nest_asyncio.py
@@ -29,6 +29,8 @@ def step(task, exc=None):
                 curr_tasks[task._loop] = curr_task
 
     Task = asyncio.Task
+    if hasattr(Task, '_nest_patched'):
+        return
     if sys.version_info >= (3, 7, 0):
 
         def enter_task(loop, task):
@@ -52,3 +54,4 @@ def leave_task(loop, task):
         except AttributeError:
             step_orig = Task._step  # type: ignore
             Task._step = step  # type: ignore
+    Task._nest_patched = True  # type: ignore