diff --git a/examples/lightrag_ollama_demo.py b/examples/lightrag_ollama_demo.py
index 1ce1f2da..b012f685 100644
--- a/examples/lightrag_ollama_demo.py
+++ b/examples/lightrag_ollama_demo.py
@@ -26,9 +26,7 @@ def configure_logging():
 
     # Get log directory path from environment variable or use current directory
     log_dir = os.getenv("LOG_DIR", os.getcwd())
-    log_file_path = os.path.abspath(
-        os.path.join(log_dir, "lightrag_ollama_demo.log")
-    )
+    log_file_path = os.path.abspath(os.path.join(log_dir, "lightrag_ollama_demo.log"))
 
     print(f"\nLightRAG compatible demo log file: {log_file_path}\n")
     os.makedirs(os.path.dirname(log_file_path), exist_ok=True)
@@ -211,6 +209,7 @@ async def main():
             await rag.llm_response_cache.index_done_callback()
             await rag.finalize_storages()
 
+
 if __name__ == "__main__":
     # Configure logging before running the main function
     configure_logging()
diff --git a/lightrag/llm/ollama.py b/lightrag/llm/ollama.py
index 7668be44..3cf10511 100644
--- a/lightrag/llm/ollama.py
+++ b/lightrag/llm/ollama.py
@@ -62,9 +62,9 @@ async def _ollama_model_if_cache(
     }
     if api_key:
         headers["Authorization"] = f"Bearer {api_key}"
-    
+
     ollama_client = ollama.AsyncClient(host=host, timeout=timeout, headers=headers)
-    
+
     try:
         messages = []
         if system_prompt:
@@ -106,15 +106,21 @@ async def _ollama_model_if_cache(
             await ollama_client._client.aclose()
             logger.debug("Successfully closed Ollama client after exception")
         except Exception as close_error:
-            logger.warning(f"Failed to close Ollama client after exception: {close_error}")
+            logger.warning(
+                f"Failed to close Ollama client after exception: {close_error}"
+            )
         raise e
     finally:
         if not stream:
             try:
                 await ollama_client._client.aclose()
-                logger.debug("Successfully closed Ollama client for non-streaming response")
+                logger.debug(
+                    "Successfully closed Ollama client for non-streaming response"
+                )
             except Exception as close_error:
-                logger.warning(f"Failed to close Ollama client in finally block: {close_error}")
+                logger.warning(
+                    f"Failed to close Ollama client in finally block: {close_error}"
+                )
 
 
 async def ollama_model_complete(
@@ -141,12 +147,12 @@ async def ollama_embed(texts: list[str], embed_model, **kwargs) -> np.ndarray:
     }
     if api_key:
         headers["Authorization"] = f"Bearer {api_key}"
-    
+
     host = kwargs.pop("host", None)
     timeout = kwargs.pop("timeout", None) or 90  # Default time out 90s
-    
+
     ollama_client = ollama.AsyncClient(host=host, timeout=timeout, headers=headers)
-    
+
     try:
         data = await ollama_client.embed(model=embed_model, input=texts)
         return np.array(data["embeddings"])
@@ -156,7 +162,9 @@ async def ollama_embed(texts: list[str], embed_model, **kwargs) -> np.ndarray:
             await ollama_client._client.aclose()
             logger.debug("Successfully closed Ollama client after exception in embed")
         except Exception as close_error:
-            logger.warning(f"Failed to close Ollama client after exception in embed: {close_error}")
+            logger.warning(
+                f"Failed to close Ollama client after exception in embed: {close_error}"
+            )
         raise e
     finally:
         try: