Update app.py

app.py

@@ -68,7 +68,6 @@ def load_chatbot():
 def main():
     st.title("BinDocs Chat App")
 
-    pdf = st.file_uploader("Upload your PDF", type="pdf")
 
     if "chat_history" not in st.session_state:
         st.session_state['chat_history'] = []
@@ -82,23 +81,26 @@ def main():
     st.write("<div style='flex: 1;'></div>", unsafe_allow_html=True)
     st.write("<!-- End Spacer -->", unsafe_allow_html=True)
 
-if pdf is not None:
-    query = st.text_input("Ask questions about your PDF file (in any preferred language):")
+    
+    pdf = st.file_uploader("Upload your PDF", type="pdf")
+
+    if pdf is not None:
+        query = st.text_input("Ask questions about your PDF file (in any preferred language):")
 
-    if st.button("Ask") or (query and query != st.session_state.get('last_input', '')):
-        st.session_state['last_input'] = query  # Save the current query as the last input
-        st.session_state['chat_history'].append(("User", query, "new"))
+        if st.button("Ask") or (query and query != st.session_state.get('last_input', '')):
+            st.session_state['last_input'] = query  # Save the current query as the last input
+            st.session_state['chat_history'].append(("User", query, "new"))
 
-        loading_message = st.empty()
-        loading_message.text('Bot is thinking...')
+            loading_message = st.empty()
+            loading_message.text('Bot is thinking...')
 
-        VectorStore = load_pdf(pdf)
-        chain = load_chatbot()
-        docs = VectorStore.similarity_search(query=query, k=3)
-        with get_openai_callback() as cb:
-            response = chain.run(input_documents=docs, question=query)
+            VectorStore = load_pdf(pdf)
+            chain = load_chatbot()
+            docs = VectorStore.similarity_search(query=query, k=3)
+            with get_openai_callback() as cb:
+                response = chain.run(input_documents=docs, question=query)
 
-        st.session_state['chat_history'].append(("Bot", response, "new"))
+            st.session_state['chat_history'].append(("Bot", response, "new"))
 
         # Display new messages at the bottom
         new_messages = st.session_state['chat_history'][-2:]