Update nest-asyncio/README.md

nest-asyncio/README.md

@@ -1,15 +1,31 @@
 ```python
 def sync(obj):
-    import asyncio, nest_asyncio; nest_asyncio.apply()
-    if asyncio.iscoroutine(obj): return asyncio.run(obj)
-    if asyncio.iscoroutinefunction(func := obj):
-        return lambda *args, **kwargs: sync(func(*args, **kwargs))
+    import asyncio, functools
+    if asyncio.iscoroutine(coro := obj):
+        loop, future = asyncio.get_event_loop(), asyncio.ensure_future(coro)
+        while not future.done():
+            loop._process_events(loop._selector.select(0))
+            if (ready := loop._ready) and not (handle := ready.popleft())._cancelled:
+                task = (tasks := asyncio.tasks._current_tasks).pop(loop, None)
+                handle._run()
+                tasks[loop] = task
+        return future.result()
+    if asyncio.iscoroutinefunction(func := obj): return functools.wraps(func)(
+        lambda *args, **kwargs: sync(func(*args, **kwargs)))
     for attr in dir(obj):
         if asyncio.iscoroutinefunction(method := getattr(obj, attr)):
             setattr(obj, attr, sync(method))
     return obj
+
 async def foo(): return 42
-sync(foo()), sync(foo)()
+print(sync(foo()), sync(foo)())
+
+from playwright.async_api import async_playwright
+browser = sync(sync(async_playwright().start()).firefox.launch())
+page = sync(sync(browser.new_page()))
+page._repr_png_ = page.screenshot
+page.goto('https://naver.com')
+page
 ```
 
 ```python