diff --git a/python/sglang/srt/managers/openai_protocol.py b/python/sglang/srt/managers/openai_protocol.py
index f4ef99dd9..320eab42b 100644
--- a/python/sglang/srt/managers/openai_protocol.py
+++ b/python/sglang/srt/managers/openai_protocol.py
@@ -1,8 +1,8 @@
 import time
 from typing import Dict, List, Optional, Union
-from typing_extensions import Literal
 
 from pydantic import BaseModel, Field
+from typing_extensions import Literal
 
 
 class LogProbs(BaseModel):
diff --git a/python/sglang/srt/server.py b/python/sglang/srt/server.py
index d21ff7f73..30a182a3e 100644
--- a/python/sglang/srt/server.py
+++ b/python/sglang/srt/server.py
@@ -440,9 +440,7 @@ class Runtime:
         additional_ports: Optional[Union[List[int], int]] = None,
     ):
         host = "127.0.0.1"
-        port, additional_ports = handle_port_init(
-            port, additional_ports, tp_size
-        )
+        port, additional_ports = handle_port_init(port, additional_ports, tp_size)
         self.server_args = ServerArgs(
             model_path=model_path,
             tokenizer_path=tokenizer_path,
diff --git a/python/sglang/srt/utils.py b/python/sglang/srt/utils.py
index 05e035a0a..9f10ef5ea 100644
--- a/python/sglang/srt/utils.py
+++ b/python/sglang/srt/utils.py
@@ -6,6 +6,7 @@ import sys
 import time
 import traceback
 from io import BytesIO
+from typing import List, Optional
 
 import numpy as np
 import requests
@@ -108,10 +109,16 @@ def check_port(port):
             return False
 
 
-def handle_port_init(port: Optional[int] = None, additional_ports: Optional[List[int]] = None, tp_size: int = 1):
+def handle_port_init(
+    port: Optional[int] = None,
+    additional_ports: Optional[List[int]] = None,
+    tp_size: int = 1,
+):
     port = 30000 if port is None else port
     additional_ports = [] if additional_ports is None else additional_ports
-    additional_ports = [additional_ports] if isinstance(additional_ports, int) else additional_ports
+    additional_ports = (
+        [additional_ports] if isinstance(additional_ports, int) else additional_ports
+    )
     # first check on server port
     if not check_port(port):
         new_port = alloc_usable_network_port(1, used_list=[port])[0]
@@ -129,10 +136,11 @@ def handle_port_init(port: Optional[int] = None, additional_ports: Optional[List
             num=4 + tp_size - num_specified_ports, used_list=can_use_ports + [port]
         )
         can_use_ports.extend(addtional_can_use_ports)
-    
-    additional_ports = can_use_ports[:4 + tp_size]
+
+    additional_ports = can_use_ports[: 4 + tp_size]
     return port, additional_ports
 
+
 def get_exception_traceback():
     etype, value, tb = sys.exc_info()
     err_str = "".join(traceback.format_exception(etype, value, tb))
diff --git a/python/sglang/test/test_conversation.py b/python/sglang/test/test_conversation.py
index 4f4f956fe..11e837ddb 100644
--- a/python/sglang/test/test_conversation.py
+++ b/python/sglang/test/test_conversation.py
@@ -1,9 +1,9 @@
 from sglang.srt.conversation import generate_chat_conv
 from sglang.srt.managers.openai_protocol import (
-    ChatCompletionMessageGenericParam,
     ChatCompletionMessageContentImagePart,
     ChatCompletionMessageContentImageURL,
     ChatCompletionMessageContentTextPart,
+    ChatCompletionMessageGenericParam,
     ChatCompletionMessageUserParam,
     ChatCompletionRequest,
 )
diff --git a/python/sglang/test/test_openai_protocol.py b/python/sglang/test/test_openai_protocol.py
index ed18e428a..99e7a8089 100644
--- a/python/sglang/test/test_openai_protocol.py
+++ b/python/sglang/test/test_openai_protocol.py
@@ -1,8 +1,8 @@
 from sglang.srt.managers.openai_protocol import (
-    ChatCompletionMessageGenericParam,
     ChatCompletionMessageContentImagePart,
     ChatCompletionMessageContentImageURL,
     ChatCompletionMessageContentTextPart,
+    ChatCompletionMessageGenericParam,
     ChatCompletionMessageUserParam,
     ChatCompletionRequest,
 )