Update app.py

app.py

@@ -20,10 +20,10 @@ def wait_on_run(run, thread):
 
 def extract_content_value(data):
     content_values = []
-    for item in data['data']:
-        for content in item['content']:
-            if content['type'] == 'text':
-                content_values.append(content['text']['value'])
+    for item in data.data:
+        for content in item.content:
+            if content.type == 'text':
+                content_values.append(content.text.value)
     return content_values
     
 def chat(message, history):