chore(render.display): Improve error message (#1020)

posit-dev · Jan 19, 2024 · f723c2b · f723c2b
1 parent 16797a7
commit f723c2b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/shiny/render/_display.py b/shiny/render/_display.py
@@ -93,7 +93,7 @@ async def render(self) -> JsonifiableDict | None:
             ret = sync_value_fn()
             if ret is not None:
                 raise RuntimeError(
-                    "@render.display functions should not return values. (`None` is allowed)."
+                    "@render.display functions should not return values. Instead, @render.display dynamically renders every printable line within the function body. (`None` is a valid return value.)"
                 )
         finally:
             sys.displayhook = orig_displayhook