Fix linting

lightrag/operate.py

@@ -445,6 +445,7 @@ async def extract_entities(
 
     # Get lock manager from shared storage
     from .kg.shared_storage import get_graph_db_lock
+
     graph_db_lock = get_graph_db_lock(enable_logging=False)
 
     async def _user_llm_func_with_cache(
@@ -620,7 +621,11 @@ async def extract_entities(
                 # Ensure edge direction consistency
                 sorted_edge_key = tuple(sorted(edge_key))
                 edge_data = await _merge_edges_then_upsert(
-                    sorted_edge_key[0], sorted_edge_key[1], edges, knowledge_graph_inst, global_config
+                    sorted_edge_key[0],
+                    sorted_edge_key[1],
+                    edges,
+                    knowledge_graph_inst,
+                    global_config,
                 )
                 chunk_relationships_data.append(edge_data)