Update app.py

app.py

@@ -98,9 +98,9 @@ st.header("Chat with your pdf💁")
 with st.sidebar:
     st.title("PDF FILE UPLOAD:")
     pdf_docs = st.file_uploader("Upload your PDF File and Click on the Submit & Process Button", accept_multiple_files=False, key="pdf_uploader")
-    
+
 query = st.chat_input("Ask a Question from the PDF File")    
-if query:
+if query and pdf_docs:
     raw_text = get_pdf(pdf_docs)
     text_chunks = text_splitter(raw_text)
     st.session_state.messages.append({'role': 'user', "content": query})