Update app.py

app.py

@@ -113,7 +113,7 @@ if uploaded_files:
                 # vector_nodes = self.vector_retriever.retrieve(query, **kwargs)
                 all_nodes = []
                 node_ids = set()
-                for n in bm25_nodes
+                for n in bm25_nodes:
                     if n.node.node_id not in node_ids:
                         all_nodes.append(n)
                         node_ids.add(n.node.node_id)