Update app.py

app.py

@@ -46,7 +46,7 @@ if "knowledge_base" not in st.session_state:
     st.session_state.knowledge_base = None
 
 if st.session_state.knowledge_base is None:
-    pdf_file = st.file_uploader("Upload a PDF file",, "csv")
+    pdf_file = st.file_uploader("Upload a PDF file", "csv")
     if pdf_file:
         with tempfile.NamedTemporaryFile(delete=False, suffix=".csv") as temp_file:
             temp_file.write(pdf_file.getbuffer())