corrected code to generate openai completion delta content

streamlit_app.py

@@ -54,7 +54,7 @@ def generate_llm_response(prompt_input):
                     temperature=temperature,
                     stream=True
     )
-    return completion.choices[0].message.content
+    return completion
 
 # User-provided prompt
 if prompt := st.chat_input(disabled=not openai_api):
@@ -70,8 +70,8 @@ if st.session_state.messages[-1]["role"] != "assistant":
             response = generate_llm_response(prompt)
             placeholder = st.empty()
             full_response = ''
-            for item in response:
-                full_response += item
+            for chunk in response:
+                full_response += chunk.choices[0].delta.content
                 placeholder.markdown(full_response)
             placeholder.markdown(full_response)
     message = {"role": "assistant", "content": full_response}