diff --git a/lightrag/tools/check_initialization.py b/lightrag/tools/check_initialization.py
index b10e31ba..6bcb17e3 100644
--- a/lightrag/tools/check_initialization.py
+++ b/lightrag/tools/check_initialization.py
@@ -2,7 +2,7 @@
 """
 Diagnostic tool to check LightRAG initialization status.
 
-This tool helps developers verify that their LightRAG instance is properly 
+This tool helps developers verify that their LightRAG instance is properly
 initialized before use, preventing common initialization errors.
 
 Usage:
@@ -11,7 +11,6 @@ Usage:
 
 import asyncio
 import sys
-from typing import Optional
 from pathlib import Path
 
 # Add parent directory to path for imports
@@ -24,44 +23,46 @@ from lightrag.base import StoragesStatus
 async def check_lightrag_setup(rag_instance: LightRAG, verbose: bool = False) -> bool:
     """
     Check if a LightRAG instance is properly initialized.
-    
+
     Args:
         rag_instance: The LightRAG instance to check
         verbose: If True, print detailed diagnostic information
-        
+
     Returns:
         True if properly initialized, False otherwise
     """
     issues = []
     warnings = []
-    
+
     print("🔍 Checking LightRAG initialization status...\n")
-    
+
     # Check storage initialization status
-    if not hasattr(rag_instance, '_storages_status'):
+    if not hasattr(rag_instance, "_storages_status"):
         issues.append("LightRAG instance missing _storages_status attribute")
     elif rag_instance._storages_status != StoragesStatus.INITIALIZED:
-        issues.append(f"Storages not initialized (status: {rag_instance._storages_status.name})")
+        issues.append(
+            f"Storages not initialized (status: {rag_instance._storages_status.name})"
+        )
     else:
         print("✅ Storage status: INITIALIZED")
-    
+
     # Check individual storage components
     storage_components = [
-        ('full_docs', 'Document storage'),
-        ('text_chunks', 'Text chunks storage'),
-        ('entities_vdb', 'Entity vector database'),
-        ('relationships_vdb', 'Relationship vector database'),
-        ('chunks_vdb', 'Chunks vector database'),
-        ('doc_status', 'Document status tracker'),
-        ('llm_response_cache', 'LLM response cache'),
-        ('full_entities', 'Entity storage'),
-        ('full_relations', 'Relation storage'),
-        ('chunk_entity_relation_graph', 'Graph storage')
+        ("full_docs", "Document storage"),
+        ("text_chunks", "Text chunks storage"),
+        ("entities_vdb", "Entity vector database"),
+        ("relationships_vdb", "Relationship vector database"),
+        ("chunks_vdb", "Chunks vector database"),
+        ("doc_status", "Document status tracker"),
+        ("llm_response_cache", "LLM response cache"),
+        ("full_entities", "Entity storage"),
+        ("full_relations", "Relation storage"),
+        ("chunk_entity_relation_graph", "Graph storage"),
     ]
-    
+
     if verbose:
         print("\n📦 Storage Components:")
-    
+
     for component, description in storage_components:
         if not hasattr(rag_instance, component):
             issues.append(f"Missing storage component: {component} ({description})")
@@ -69,52 +70,57 @@ async def check_lightrag_setup(rag_instance: LightRAG, verbose: bool = False) ->
             storage = getattr(rag_instance, component)
             if storage is None:
                 warnings.append(f"Storage {component} is None (might be optional)")
-            elif hasattr(storage, '_storage_lock'):
+            elif hasattr(storage, "_storage_lock"):
                 if storage._storage_lock is None:
                     issues.append(f"Storage {component} not initialized (lock is None)")
                 elif verbose:
                     print(f"  ✅ {description}: Ready")
             elif verbose:
                 print(f"  ✅ {description}: Ready")
-    
+
     # Check pipeline status
     try:
         from lightrag.kg.shared_storage import get_namespace_data
+
         get_namespace_data("pipeline_status")
         print("✅ Pipeline status: INITIALIZED")
     except KeyError:
-        issues.append("Pipeline status not initialized - call initialize_pipeline_status()")
+        issues.append(
+            "Pipeline status not initialized - call initialize_pipeline_status()"
+        )
     except Exception as e:
         issues.append(f"Error checking pipeline status: {str(e)}")
-    
+
     # Print results
     print("\n" + "=" * 50)
-    
+
     if issues:
         print("❌ Issues found:\n")
         for issue in issues:
             print(f"  • {issue}")
-        
+
         print("\n📝 To fix, run this initialization sequence:\n")
         print("  await rag.initialize_storages()")
         print("  from lightrag.kg.shared_storage import initialize_pipeline_status")
         print("  await initialize_pipeline_status()")
-        print("\n📚 Documentation: https://github.com/HKUDS/LightRAG#important-initialization-requirements")
-        
+        print(
+            "\n📚 Documentation: https://github.com/HKUDS/LightRAG#important-initialization-requirements"
+        )
+
         if warnings and verbose:
             print("\n⚠️  Warnings (might be normal):")
             for warning in warnings:
                 print(f"  • {warning}")
-        
+
         return False
     else:
         print("✅ LightRAG is properly initialized and ready to use!")
-        
+
         if warnings and verbose:
             print("\n⚠️  Warnings (might be normal):")
             for warning in warnings:
                 print(f"  • {warning}")
-        
+
         return True
 
 
@@ -122,55 +128,53 @@ async def demo():
     """Demonstrate the diagnostic tool with a test instance."""
     from lightrag.llm.openai import openai_embed, gpt_4o_mini_complete
     from lightrag.kg.shared_storage import initialize_pipeline_status
-    
+
     print("=" * 50)
     print("LightRAG Initialization Diagnostic Tool")
     print("=" * 50)
-    
+
     # Create test instance
     rag = LightRAG(
         working_dir="./test_diagnostic",
         embedding_func=openai_embed,
         llm_model_func=gpt_4o_mini_complete,
     )
-    
+
     print("\n🔴 BEFORE initialization:\n")
     await check_lightrag_setup(rag, verbose=True)
-    
+
     print("\n" + "=" * 50)
     print("\n🔄 Initializing...\n")
     await rag.initialize_storages()
     await initialize_pipeline_status()
-    
+
     print("\n🟢 AFTER initialization:\n")
     await check_lightrag_setup(rag, verbose=True)
-    
+
     # Cleanup
     import shutil
+
     shutil.rmtree("./test_diagnostic", ignore_errors=True)
 
 
 if __name__ == "__main__":
     import argparse
-    
-    parser = argparse.ArgumentParser(
-        description="Check LightRAG initialization status"
+
+    parser = argparse.ArgumentParser(description="Check LightRAG initialization status")
+    parser.add_argument(
+        "--demo", action="store_true", help="Run a demonstration with a test instance"
     )
     parser.add_argument(
-        "--demo", 
+        "--verbose",
+        "-v",
         action="store_true",
-        help="Run a demonstration with a test instance"
+        help="Show detailed diagnostic information",
     )
-    parser.add_argument(
-        "--verbose", "-v",
-        action="store_true",
-        help="Show detailed diagnostic information"
-    )
-    
+
     args = parser.parse_args()
-    
+
     if args.demo:
         asyncio.run(demo())
     else:
         print("Run with --demo to see the diagnostic tool in action")
-        print("Or import this module and use check_lightrag_setup() with your instance")
\ No newline at end of file
+        print("Or import this module and use check_lightrag_setup() with your instance")