Update app.py

trying to fix json extraction

app.py

@@ -66,14 +66,15 @@ def get_melody_from_intent(intent, model_name):
     """
     response = query_llm(melody_prompt, model_name)
     print(f"\n[DEBUG] LLM Response for melody:\n{response}\n")
-    match = re.search(r'\[.*\]', response, re.DOTALL)
-    if match:
-        try:
-            melody = json.loads(match.group(0))
-            if isinstance(melody, list) and len(melody) > 0:
-                return melody
-        except json.JSONDecodeError as e:
-            print(f"[ERROR] Melody JSON decode error: {e}")
+
+    try:
+        json_strs = re.findall(r'\[\s*\{[^]]+\}\s*\]', response, re.DOTALL)
+        for js in json_strs:
+            parsed = json.loads(js)
+            if isinstance(parsed, list) and all("note" in note and "octave" in note and "duration" in note for note in parsed):
+                return parsed
+    except json.JSONDecodeError as e:
+        print(f"[ERROR] Melody JSON decode error: {e}")
 
     print("[WARNING] Using fallback melody.")
     return [