Update app.py

app.py

@@ -129,18 +129,20 @@ def respond(
         result = ""
         appended = False
         for chunk in completion:
-            result += chunk.choices[0].delta.content
-            if not appended:
-                history.append(
-                   ChatMessage(
-                        role="assistant",
-                        content="",
+            print(chunk)
+            if chunk.choices[0].delta.content:
+                result += chunk.choices[0].delta.content
+                if not appended:
+                    history.append(
+                       ChatMessage(
+                            role="assistant",
+                            content="",
+                        )
                     )
-                )
-                appended = True
-                
-            history[-1].content = result
-            yield history[-2:]
+                    appended = True
+                    
+                history[-1].content = result
+                yield history[-2:]
 
 """
 For information on how to customize the ChatInterface, peruse the gradio docs: https://www.gradio.app/docs/chatinterface