con: the underlying SteadyDB connection"""#basic initialization to make finalizer workself._con =None#proper initialization of the connectionifnotcon.threadsafety():raiseNotSupportedError("Database module is not thread-safe.") self._pool=pool self._con=condefclose(self):"""Close the pooled dedi...
# proper initialization of the connection if not con.threadsafety(): raise NotSupportedError("Database module is not thread-safe.") self._pool = pool self._con = con def close(self): """Close the pooled dedicated connection.""" # Instead of actually closing the connection, # return it ...
github.io/w4py/ Usage: First you need to set up the database connection pool by creating an instance of PooledDB, passing the following parameters: creator: either an arbitrary function returning new DB-API 2 connection objects or a DB-API 2 compliant database module mincached: the initial...
在上述示例中，我们首先连接到SQLite数据库（确保替换'mydatabase.db'为你的数据库文件路径），然后创建...
dmPython.DatabaseError: [CODE:-70089]加密模块加载失败该报错意味着在尝试使用达梦数据库的加密功能时...
Measures are taken to make the database connections thread-affine. This means the same thread always uses the same cached connection, and no other thread will use it. So even if the underlying DB-API module is not thread-safe at the connection level this will be no problem here. For best...
### 想要一个与本地数据库mydb的至少五个连接的数据库连接池importpgdb# import used DB-API 2 modulefromdbutils.pooled_dbimportPooledDB pool = PooledDB(pgdb,5, database='mydb')### 设置连接池后,可以从该池请求数据库连接:db = pool.connection()### 设置非零maxshared参数, 默认情况下连接可...
3.1 MODULE dmPython 3.1.1 接口 3.1.1.1 dmPython.connect 语法: dmPython.connect(*args, **kwargs) dmPython.Connect(*args, **kwargs) 说明: 创建与数据库的连接,这两个方法完全等效,返回一个 connection 对象。参数为连接属性,所有连接属性都可以用关键字指定,在 connection 连接串中,没有指定的...
Connection对象即为数据库连接对象,在python中可以使用pymysql.connect()方法创建Connection对象,该方法的常用参数如下: host:连接的数据库服务器主机名,默认为本地主机(localhost);字符串类型(String) 。 user:用户名,默认为当前用户;字符串类型(String) 。
Or you can try to access the database when making the connection:Example Try connecting to the database "mydatabase": import mysql.connectormydb = mysql.connector.connect( host="localhost", user="yourusername", password="yourpassword", database="mydatabase") Run example » ...