Update app.py

app.py

@@ -38,10 +38,11 @@ def embedding_db():
 
 def doc_preprocessing():
     loader = DirectoryLoader(
-        'data/',
+        'data/',   # Assuming the 'data' folder is in the same directory
         glob='**/*.pdf', 
         show_progress=True
     )
+    )
     docs = loader.load()
     text_splitter = CharacterTextSplitter(
         chunk_size=1000,