style: normalize python formatting gates

packages/adapters/postgres/connection_pool.py

@@ -1,7 +1,9 @@
 """
 数据库连接池管理
 """
+
 from typing import Optional
+
 import psycopg2
 from psycopg2 import pool
 from psycopg2.extras import RealDictCursor
@@ -9,15 +11,15 @@ from psycopg2.extras import RealDictCursor
 
 class DatabaseConnectionPool:
     """PostgreSQL 连接池"""
-    
-    _instance: Optional['DatabaseConnectionPool'] = None
+
+    _instance: Optional["DatabaseConnectionPool"] = None
     _pool: Optional[pool.ThreadedConnectionPool] = None
-    
+
     def __new__(cls):
         if cls._instance is None:
             cls._instance = super().__new__(cls)
         return cls._instance
-    
+
     def initialize(
         self,
         connection_string: str,
@@ -31,18 +33,18 @@ class DatabaseConnectionPool:
                 maxconn=maxconn,
                 dsn=connection_string,
             )
-    
+
     def get_connection(self):
         """从连接池获取连接"""
         if self._pool is None:
             raise RuntimeError("Connection pool not initialized")
         return self._pool.getconn()
-    
+
     def put_connection(self, conn):
         """将连接归还到连接池"""
         if self._pool is not None:
             self._pool.putconn(conn)
-    
+
     def close_all(self):
         """关闭所有连接"""
         if self._pool is not None:
@@ -56,17 +58,17 @@ db_pool = DatabaseConnectionPool()
 
 class PooledConnection:
     """连接池上下文管理器"""
-    
+
     def __init__(self, cursor_factory=RealDictCursor):
         self.cursor_factory = cursor_factory
         self.conn = None
-    
+
     def __enter__(self):
         self.conn = db_pool.get_connection()
         if self.cursor_factory:
             self.conn.cursor_factory = self.cursor_factory
         return self.conn
-    
+
     def __exit__(self, exc_type, exc_val, exc_tb):
         if self.conn:
             if exc_type is not None: