Update app.py

app.py

@@ -493,11 +493,12 @@ async def generate_function_call(prompt):
         output += response.token.text
 
     # Find the first and last curly braces in the output
-    start_index = output.find('{')
-    end_index = output.rfind('}')
+    start_index = output.rfind("{")  # Find the last occurrence of "{"
+    end_index = output.find("}")     # Find the first occurrence of "}"
     
-    if start_index != -1 and end_index != -1:
+    if start_index != -1 and end_index != -1 and start_index < end_index:
         json_string = output[start_index:end_index + 1]
+
         try:
             # Attempt to parse the trimmed string as JSON
             parsed_json = json.loads(json_string)