Merge pull request #2811 from rmartin16/gen-handler-always-sleep

Always sleep between iterations of generator handlers
beeware · Sep 4, 2024 · fb5add4 · fb5add4
2 parents cc849f8 + 8284666
commit fb5add4
Show file tree

Hide file tree

Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/changes/2811.bugfix.rst b/changes/2811.bugfix.rst
@@ -0,0 +1 @@
+When a handler is a generator, control will now always be released to the event loop between iterations, even if no sleep interval or a sleep interval of 0 is yielded.
diff --git a/core/src/toga/handlers.py b/core/src/toga/handlers.py
@@ -89,8 +89,7 @@ async def long_running_task(
         try:
             while True:
                 delay = next(generator)
-                if delay:
-                    await asyncio.sleep(delay)
+                await asyncio.sleep(delay if delay else 0)
         except StopIteration as e:
             result = e.value
     except Exception as e: