Detailed error message for wasm_utils.get_registered_app() (#7572)

* Detailed error message for wasm_utils.get_registered_app() * add changeset --------- Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com> Co-authored-by: Ali Abdalla <ali.si3luwa@gmail.com>
gradio-app · Mar 18, 2024 · 7d3c868 · 7d3c868
1 parent f67759d
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diff --git a/.changeset/major-results-stick.md b/.changeset/major-results-stick.md
@@ -0,0 +1,5 @@
+---
+"gradio": minor
+---
+
+feat:Detailed error message for wasm_utils.get_registered_app()
diff --git a/gradio/wasm_utils.py b/gradio/wasm_utils.py
@@ -46,5 +46,14 @@ def register_app(_app):
     app_map[app_id] = _app
 
 
+class GradioAppNotFoundError(Exception):
+    pass
+
+
 def get_registered_app(app_id: str):
-    return app_map[app_id]
+    try:
+        return app_map[app_id]
+    except KeyError as e:
+        raise GradioAppNotFoundError(
+            f"Gradio app not found (ID: {app_id}). Forgot to call demo.launch()?"
+        ) from e