add prints

app.py

@@ -75,7 +75,7 @@ def predict(query, pdf_file):
             
             with open(pdf_path, 'wb') as f:
                 pdf_writer.write(f)
-        os.system("ls data")
+        os.system("ls data/pdf")
             
     pdf_paths = load_pdf_paths(data_root)
     rag_chain = build_rag_chain(pdf_paths)