diff --git a/lightrag/api/lightrag_server.py b/lightrag/api/lightrag_server.py
index 2ee2838e..fc6f1580 100644
--- a/lightrag/api/lightrag_server.py
+++ b/lightrag/api/lightrag_server.py
@@ -41,12 +41,14 @@ from .ollama_api import ollama_server_infos
 # Load environment variables
 load_dotenv()
 
+
 class RAGStorageConfig:
     KV_STORAGE = "JsonKVStorage"
     DOC_STATUS_STORAGE = "JsonDocStatusStorage"
     GRAPH_STORAGE = "NetworkXStorage"
     VECTOR_STORAGE = "NanoVectorDBStorage"
 
+
 # Initialize rag storage config
 rag_storage_config = RAGStorageConfig()
 
@@ -592,6 +594,7 @@ class SearchMode(str, Enum):
     hybrid = "hybrid"
     mix = "mix"
 
+
 class QueryRequest(BaseModel):
     query: str
     mode: SearchMode = SearchMode.hybrid
diff --git a/lightrag/api/ollama_api.py b/lightrag/api/ollama_api.py
index 49ec8414..e2637db0 100644
--- a/lightrag/api/ollama_api.py
+++ b/lightrag/api/ollama_api.py
@@ -12,6 +12,7 @@ import asyncio
 from ascii_colors import trace_exception
 from lightrag import LightRAG, QueryParam
 
+
 class OllamaServerInfos:
     # Constants for emulated Ollama model information
     LIGHTRAG_NAME = "lightrag"
@@ -21,8 +22,10 @@ class OllamaServerInfos:
     LIGHTRAG_CREATED_AT = "2024-01-15T00:00:00Z"
     LIGHTRAG_DIGEST = "sha256:lightrag"
 
+
 ollama_server_infos = OllamaServerInfos()
 
+
 # query mode according to query prefix (bypass is not LightRAG quer mode)
 class SearchMode(str, Enum):
     naive = "naive"
@@ -32,11 +35,13 @@ class SearchMode(str, Enum):
     mix = "mix"
     bypass = "bypass"
 
+
 class OllamaMessage(BaseModel):
     role: str
     content: str
     images: Optional[List[str]] = None
 
+
 class OllamaChatRequest(BaseModel):
     model: str
     messages: List[OllamaMessage]
@@ -44,12 +49,14 @@ class OllamaChatRequest(BaseModel):
     options: Optional[Dict[str, Any]] = None
     system: Optional[str] = None
 
+
 class OllamaChatResponse(BaseModel):
     model: str
     created_at: str
     message: OllamaMessage
     done: bool
 
+
 class OllamaGenerateRequest(BaseModel):
     model: str
     prompt: str
@@ -57,6 +64,7 @@ class OllamaGenerateRequest(BaseModel):
     stream: bool = False
     options: Optional[Dict[str, Any]] = None
 
+
 class OllamaGenerateResponse(BaseModel):
     model: str
     created_at: str
@@ -70,9 +78,11 @@ class OllamaGenerateResponse(BaseModel):
     eval_count: Optional[int]
     eval_duration: Optional[int]
 
+
 class OllamaVersionResponse(BaseModel):
     version: str
 
+
 class OllamaModelDetails(BaseModel):
     parent_model: str
     format: str
@@ -81,6 +91,7 @@ class OllamaModelDetails(BaseModel):
     parameter_size: str
     quantization_level: str
 
+
 class OllamaModel(BaseModel):
     name: str
     model: str
@@ -89,9 +100,11 @@ class OllamaModel(BaseModel):
     modified_at: str
     details: OllamaModelDetails
 
+
 class OllamaTagResponse(BaseModel):
     models: List[OllamaModel]
 
+
 def estimate_tokens(text: str) -> int:
     """Estimate the number of tokens in text
     Chinese characters: approximately 1.5 tokens per character
@@ -106,6 +119,7 @@ def estimate_tokens(text: str) -> int:
 
     return int(tokens)
 
+
 def parse_query_mode(query: str) -> tuple[str, SearchMode]:
     """Parse query prefix to determine search mode
     Returns tuple of (cleaned_query, search_mode)
@@ -127,6 +141,7 @@ def parse_query_mode(query: str) -> tuple[str, SearchMode]:
 
     return query, SearchMode.hybrid
 
+
 class OllamaAPI:
     def __init__(self, rag: LightRAG):
         self.rag = rag
@@ -333,10 +348,13 @@ class OllamaAPI:
                     "stream": request.stream,
                     "only_need_context": False,
                     "conversation_history": conversation_history,
-                    "top_k": self.rag.args.top_k if hasattr(self.rag, 'args') else 50,
+                    "top_k": self.rag.args.top_k if hasattr(self.rag, "args") else 50,
                 }
 
-                if hasattr(self.rag, 'args') and self.rag.args.history_turns is not None:
+                if (
+                    hasattr(self.rag, "args")
+                    and self.rag.args.history_turns is not None
+                ):
                     param_dict["history_turns"] = self.rag.args.history_turns
 
                 query_param = QueryParam(**param_dict)
@@ -521,7 +539,9 @@ class OllamaAPI:
                             **self.rag.llm_model_kwargs,
                         )
                     else:
-                        response_text = await self.rag.aquery(cleaned_query, param=query_param)
+                        response_text = await self.rag.aquery(
+                            cleaned_query, param=query_param
+                        )
 
                     last_chunk_time = time.time_ns()