Update nest-asyncio/README.md

nest-asyncio/README.md

@@ -1,19 +1,24 @@
 ```python
-import asyncio
-def _run_once(loop):
-    loop._process_events(loop._selector.select(0))
-    if (ready := loop._ready) and (handle := ready.popleft())._cancelled is False:
-        task = (tasks := asyncio.tasks._current_tasks).pop(loop, None)
-        handle._run(); tasks[loop] = task
-(loop := asyncio.get_event_loop()).__class__._run_once = _run_once
-asyncio.run = loop.run_until_complete; loop.__class__._check_running = lambda _: 0
+def sync(coro):
+    import asyncio, functools
+    if not asyncio.iscoroutinefunction(coro): return coro
+    @functools.wraps(coro)
+    def wrapper(*args, **kwargs):
+        loop, future = asyncio.get_event_loop(), asyncio.ensure_future(coro(*args, **kwargs))
+        while not future.done(): 
+            loop._process_events(loop._selector.select(0))
+            if (ready := loop._ready) and (handle := ready.popleft())._cancelled is False:
+                task = (tasks := asyncio.tasks._current_tasks).pop(loop, None)
+                handle._run(); tasks[loop] = task
+        return future.result()
+    return wrapper
 
+@sync
 async def hello():
-    print('hello')
-    async def world(): 
-        print('world')
-    asyncio.run(world())
-asyncio.run(hello())
+    @sync
+    async def world(): print('hello')
+    world() or print('world')
+hello()
 """
 hello
 world