Fix task scheduling in pyodide

panel/io/callbacks.py

@@ -141,12 +141,10 @@ async def _async_repeat(self, func):
         """
         while True:
             start = time.monotonic()
-            self._cb = asyncio.ensure_future(func())
-            await self._cb
+            await func()
             timeout = (self.period/1000.) - (time.monotonic()-start)
             if timeout > 0:
-                self._cb = asyncio.ensure_future(asyncio.sleep(timeout))
-                await self._cb
+                await asyncio.sleep(timeout)
 
     def _cleanup(self, session_context):
         self.stop()
@@ -165,11 +163,9 @@ def start(self):
                 self._updating = False
         self._start_time = time.time()
         if state._is_pyodide:
-            event_loop = asyncio.get_running_loop()
-            task = asyncio.create_task(
+            self._cb = asyncio.create_task(
                 self._async_repeat(self._periodic_callback)
             )
-            event_loop.call_soon(task)
         elif state.curdoc:
             self._doc = state.curdoc
             self._cb = self._doc.add_periodic_callback(self._periodic_callback, self.period)

panel/io/pyodide.py

@@ -30,7 +30,7 @@
 def async_execute(func):
     event_loop = asyncio.get_running_loop()
     if event_loop.is_running():
-        event_loop.call_soon(func)
+        asyncio.create_task(func())
     else:
         event_loop.run_until_complete(func())
     return
@@ -124,7 +124,7 @@ async def show(obj, target):
     """
     from js import console
     console.log('panel.io.pyodide.show is deprecated in favor of panel.io.pyodide.write')
-    write(target, obj)
+    await write(target, obj)
 
 async def write(target, obj):
     """

panel/viewable.py

@@ -380,7 +380,7 @@ def servable(
                 out = sys.stdout._out
             else:
                 raise ValueError("Could not determine target node to write to.")
-            param.parameterized.async_executor(asyncio.create_task(write(out, self)))
+            asyncio.create_task(write(out, self))
         return self
 
     def show(