Update app.py

app.py

@@ -1306,15 +1306,18 @@ Remember to write out the complete solution even if you are repeating things fro
 
 # Add this function to update subtopic choices
 def update_subtopics(subject):
+    logger.debug(f"update_subtopics called with subject: {subject}")
     if subject in SUBJECT_SUBTOPICS:
-        return {
-            "choices": SUBJECT_SUBTOPICS[subject],
-            "visible": True
-        }
-    return {
-        "choices": [],
-        "visible": False
-    }
+        logger.debug(f"Found subtopics: {SUBJECT_SUBTOPICS[subject]}")
+        return gr.Dropdown.update(
+            choices=SUBJECT_SUBTOPICS[subject],
+            visible=True
+        )
+    logger.debug("No subtopics found for subject")
+    return gr.Dropdown.update(
+        choices=[],
+        visible=False
+    )
 
 # Create Gradio interface
 with gr.Blocks() as interface: