Update app.py

app.py

@@ -7,22 +7,33 @@ openai_api_key = os.getenv("OPENAI_API_KEY")
 
 st.title("💬 Chatbot")
 st.caption("")
+
+# Initialize session state for storing messages if it doesn't already exist
 if "messages" not in st.session_state:
     st.session_state["messages"] = [{"role": "assistant", "content": "How can I help you?"}]
 
+# Display all previous messages
 for msg in st.session_state.messages:
     st.chat_message(msg["role"]).write(msg["content"])
 
-if prompt := st.chat_input():
+# Input for new prompts
+prompt = st.chat_input("Enter your question:")
+if prompt:
     if not openai_api_key:
         st.error("No OpenAI API key found. Please set the OPENAI_API_KEY environment variable.")
         st.stop()
 
-    client = OpenAI(api_key=openai_api_key)
+    # Append the new user message to session state
     st.session_state.messages.append({"role": "user", "content": prompt})
     st.chat_message("user").write(prompt)
-    response = client.chat.completions.create(model="gpt-3.5-turbo", messages=st.session_state.messages)
-    msg = response.choices[0].message.content
+
+    # Use a spinner to indicate that the model is generating a response
+    with st.spinner('Thinking...'):
+        client = OpenAI(api_key=openai_api_key)
+        response = client.chat.completions.create(model="gpt-3.5-turbo", messages=st.session_state.messages)
+        msg = response.choices[0].message.content
+
+    # Append and display the assistant's response
     st.session_state.messages.append({"role": "assistant", "content": msg})
     st.chat_message("assistant").write(msg)