diff --git a/examples/llm/common/utils.py b/examples/llm/common/utils.py
index 406c7eee6d..23e9f69559 100644
--- a/examples/llm/common/utils.py
+++ b/examples/llm/common/utils.py
@@ -24,18 +24,13 @@
 logger = logging.getLogger(__name__)
 
 
-def build_huggingface_embeddings(model_name: str,
-                                 model_kwargs: dict = None,
-                                 encode_kwargs: dict = None):
-    embeddings = HuggingFaceEmbeddings(model_name=model_name,
-                                       model_kwargs=model_kwargs,
-                                       encode_kwargs=encode_kwargs)
+def build_huggingface_embeddings(model_name: str, model_kwargs: dict = None, encode_kwargs: dict = None):
+    embeddings = HuggingFaceEmbeddings(model_name=model_name, model_kwargs=model_kwargs, encode_kwargs=encode_kwargs)
 
     return embeddings
 
 
-def build_llm_service(model_name: str, llm_service: str,
-                      tokens_to_generate: int, **model_kwargs):
+def build_llm_service(model_name: str, llm_service: str, tokens_to_generate: int, **model_kwargs):
     lowered_llm_service = llm_service.lower()
     if (lowered_llm_service == 'nemollm'):
         model_kwargs['tokens_to_generate'] = tokens_to_generate
@@ -62,15 +57,13 @@ def build_milvus_config(embedding_size: int):
             },
         },
         "schema_conf": {
-            "enable_dynamic_field":
-            True,
+            "enable_dynamic_field": True,
             "schema_fields": [
-                pymilvus.FieldSchema(
-                    name="id",
-                    dtype=pymilvus.DataType.INT64,
-                    description="Primary key for the collection",
-                    is_primary=True,
-                    auto_id=True).to_dict(),
+                pymilvus.FieldSchema(name="id",
+                                     dtype=pymilvus.DataType.INT64,
+                                     description="Primary key for the collection",
+                                     is_primary=True,
+                                     auto_id=True).to_dict(),
                 pymilvus.FieldSchema(name="title",
                                      dtype=pymilvus.DataType.VARCHAR,
                                      description="The title of the RSS Page",
@@ -83,30 +76,28 @@ def build_milvus_config(embedding_size: int):
                                      dtype=pymilvus.DataType.VARCHAR,
                                      description="The summary of the RSS Page",
                                      max_length=65_535).to_dict(),
-                pymilvus.FieldSchema(
-                    name="page_content",
-                    dtype=pymilvus.DataType.VARCHAR,
-                    description="A chunk of text from the RSS Page",
-                    max_length=65_535).to_dict(),
+                pymilvus.FieldSchema(name="page_content",
+                                     dtype=pymilvus.DataType.VARCHAR,
+                                     description="A chunk of text from the RSS Page",
+                                     max_length=65_535).to_dict(),
                 pymilvus.FieldSchema(name="embedding",
                                      dtype=pymilvus.DataType.FLOAT_VECTOR,
                                      description="Embedding vectors",
                                      dim=embedding_size).to_dict(),
             ],
-            "description":
-            "Test collection schema"
+            "description": "Test collection schema"
         }
     }
 
     return milvus_resource_kwargs
 
 
-def build_milvus_service(embedding_size: int,
-                         uri: str = "http://localhost:19530"):
+def build_milvus_service(embedding_size: int, uri: str = "http://localhost:19530"):
     milvus_resource_kwargs = build_milvus_config(embedding_size)
 
-    vdb_service: MilvusVectorDBService = VectorDBServiceFactory.create_instance(
-        "milvus", uri=uri, **milvus_resource_kwargs)
+    vdb_service: MilvusVectorDBService = VectorDBServiceFactory.create_instance("milvus",
+                                                                                uri=uri,
+                                                                                **milvus_resource_kwargs)
 
     return vdb_service