diff --git a/community/test/api/upload/command.py b/community/test/api/upload/command.py
index 622a34d..b5aa69d 100755
--- a/community/test/api/upload/command.py
+++ b/community/test/api/upload/command.py
@@ -8,7 +8,7 @@ import requests
 ROOT_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.append(ROOT_DIR)
 
-from api.utils import (
+from api.utils import (  # noqa: E402
     OPENAPI_URL,
     PROJECT_ID,
     SERVER_URL,
diff --git a/merico/chatflow/util/contexts.py b/merico/chatflow/util/contexts.py
index 76c947c..2dcf435 100644
--- a/merico/chatflow/util/contexts.py
+++ b/merico/chatflow/util/contexts.py
@@ -57,7 +57,7 @@ def load_existing_workflow_defines() -> str:
                 with open(os.path.join(root, "command.yml"), "r") as f:
                     wrkflow_defines.append(
                         (
-                            f"工作流命令/{root[len(root_path)+1:].replace(os.sep, '.')}的定义："
+                            f"工作流命令/{root[len(root_path) + 1 :].replace(os.sep, '.')}的定义："
                             f"\n{f.read()}\n\n"
                         )
                     )
diff --git a/merico/refactor/rewrite.py b/merico/refactor/rewrite.py
index 8e9ee20..670f123 100644
--- a/merico/refactor/rewrite.py
+++ b/merico/refactor/rewrite.py
@@ -310,7 +310,7 @@ def format_symbol_results(symbols: List[Dict[str, Any]], definitions: Dict[str,
     result += f"找到 {len(symbols)} 个可能缺少定义的符号：\n\n"
 
     for i, symbol in enumerate(symbols):
-        result += f"### {i+1}. {symbol['name']} ({symbol['type']})\n\n"
+        result += f"### {i + 1}. {symbol['name']} ({symbol['type']})\n\n"
         result += f"- 位置: 第{symbol['line'] + 1}行，第{symbol['character'] + 1}列\n"
         result += f"- 原因: {symbol['reason']}\n\n"
 
@@ -340,7 +340,7 @@ def format_usage_suggestions(suggestions: List[Dict[str, Any]]) -> str:
     result = "## 符号使用建议\n\n"
 
     for i, suggestion in enumerate(suggestions):
-        result += f"### {i+1}. {suggestion['symbol']}\n\n"
+        result += f"### {i + 1}. {suggestion['symbol']}\n\n"
         result += f"**正确使用方法**:\n{suggestion['explanation']}\n\n"
 
         if suggestion.get("errors"):
diff --git a/merico/unit_tests/ut_workflow.py b/merico/unit_tests/ut_workflow.py
index b670413..052ecbe 100644
--- a/merico/unit_tests/ut_workflow.py
+++ b/merico/unit_tests/ut_workflow.py
@@ -293,7 +293,10 @@ class UnitTestsWorkflow:
             width = len(str(len(contexts)))
             lines.extend(
                 [
-                    f"{(i + 1):>{width}}. {c.file_path}:{c.range.start.line + 1}-{c.range.end.line + 1}"
+                    (
+                        f"{(i + 1):>{width}}. {c.file_path}:"
+                        f"{c.range.start.line + 1}-{c.range.end.line + 1}"
+                    )
                     for i, c in enumerate(contexts)
                 ]
             )