fix actions

examples/animation.py

@@ -7,18 +7,18 @@ from textual.widgets import Footer, Placeholder
 class SmoothApp(App):
     """Demonstrates smooth animation. Press 'b' to see it in action."""
 
-    async def on_load(self, event: events.Load) -> None:
+    async def on_load(self) -> None:
         """Bind keys here."""
         await self.bind("b", "toggle_sidebar", "Toggle sidebar")
         await self.bind("q", "quit", "Quit")
 
-    show_bar: Reactive[bool] = Reactive(False)
+    show_bar = Reactive(False)
 
-    async def watch_show_bar(self, show_bar: bool) -> None:
+    def watch_show_bar(self, show_bar: bool) -> None:
         """Called when show_bar changes."""
         self.bar.animate("layout_offset_x", 0 if show_bar else -40)
 
-    async def action_toggle_sidebar(self) -> None:
+    def action_toggle_sidebar(self) -> None:
         """Called when user hits 'b' key."""
         self.show_bar = not self.show_bar
 

src/textual/app.py

@@ -19,6 +19,7 @@ from ._animator import Animator
 from .binding import Bindings, NoBinding
 from .geometry import Offset, Region
 from . import log
+from ._callback import invoke
 from ._context import active_app
 from ._event_broker import extract_handler_actions, NoHandler
 from ._types import MessageTarget
@@ -407,8 +408,8 @@ class App(MessagePump):
         _rich_traceback_guard = True
         method_name = f"action_{action_name}"
         method = getattr(namespace, method_name, None)
-        if method is not None:
-            await method(*params)
+        if callable(method):
+            await invoke(method, *params)
 
     async def broker_event(
         self, event_name: str, event: events.Event, default_namespace: object | None