style: format all Python files with Black

Apply Black formatter to the entire codebase for consistent code style.

Co-Authored-By: Claude (glm-5) <noreply@anthropic.com>

db/table_name_converter.py

@@ -12,7 +12,7 @@ class TableNameConverter:
     """表名转换工具类"""
 
     # 匹配 SQL Server 表名格式：[schema].[tablename] 或 [schema].[table name]
-    SQLSERVER_PATTERN = re.compile(r'\[([^\]]+)\]\.\[([^\]]+)\]')
+    SQLSERVER_PATTERN = re.compile(r"\[([^\]]+)\]\.\[([^\]]+)\]")
 
     @staticmethod
     def to_mysql(table_name: str) -> str:
@@ -66,7 +66,7 @@ class TableNameConverter:
             '[productionContractData].[26年压力表合同数据]'
         """
         # 分割第一个下划线
-        parts = table_name.split('_', 1)
+        parts = table_name.split("_", 1)
         if len(parts) == 2:
             schema = parts[0]
             table = parts[1]
@@ -92,21 +92,24 @@ class TableNameConverter:
             >>> TableNameConverter.convert_sql(sql, 'mysql')
             'SELECT * FROM dbo_BIPUsers WHERE ID = ?'
         """
-        if db_type == 'mysql':
+        if db_type == "mysql":
             # SQL Server → MySQL
             def replace_to_mysql(match):
                 schema = match.group(1)
                 table = match.group(2)
                 return f"{schema}_{table}"
+
             result = TableNameConverter.SQLSERVER_PATTERN.sub(replace_to_mysql, sql)
             return result
-        elif db_type == 'sqlserver':
+        elif db_type == "sqlserver":
             # MySQL → SQL Server
             # 首先查找可能的 MySQL 格式表名（schema_table 格式）
             # 这是一个简化版本，可能无法处理所有边缘情况
             result = sql
             # 查找单词字符_单词字符 的模式（可能是表名）
-            mysql_pattern = re.compile(r'\b([a-zA-Z_][a-zA-Z0-9_]*)_([a-zA-Z0-9_\u4e00-\u9fff]+)\b')
+            mysql_pattern = re.compile(
+                r"\b([a-zA-Z_][a-zA-Z0-9_]*)_([a-zA-Z0-9_\u4e00-\u9fff]+)\b"
+            )
             matches = mysql_pattern.findall(result)
             for schema, table in set(matches):
                 mysql_name = f"{schema}_{table}"
@@ -133,7 +136,7 @@ class TableNameConverter:
             tables.append(f"{schema}_{table}")
 
         # 查找可能的 MySQL 格式
-        mysql_pattern = re.compile(r'\b[a-zA-Z_][a-zA-Z0-9_]*_[a-zA-Z0-9_]+\b')
+        mysql_pattern = re.compile(r"\b[a-zA-Z_][a-zA-Z0-9_]*_[a-zA-Z0-9_]+\b")
         mysql_matches = mysql_pattern.findall(sql)
         tables.extend(mysql_matches)