Update app.py

app.py

@@ -86,12 +86,14 @@ def query_response(query, _retriever):
 if "doc" not in st.session_state:
     st.session_state.doc = ""
 
-course_material = st.file_uploader("or Upload your own pdf", type="pdf")
+course_material = st.file_uploader("or Upload your own pdf", type="pdf", key='doc')
 
 if st.session_state != "":
     try:
         if st.button("load"):
-            doc_retriever = get_retriever(course_material)
+            with st.soinner("loading document.."):
+                doc_retriever = get_retriever(course_material)
+                
             st.success("File loading successful, vector db initialize")
     except:
         st.error("Upload your file")
@@ -114,7 +116,7 @@ if st.session_state != "":
             st.markdown(message["content"])
 
     # We take questions/instructions from the chat input to pass to the LLM
-    if user_prompt := st.chat_input("Your message here", key="user_input"):
+    if user_prompt := st.chat_input("Ask...", key="user_input"):
         # Add our input to the session state
         st.session_state.messages.append({"role": "user", "content": user_prompt})