python twsited 里的数据连接池

from twisted.enterprise import adbapi, util as dbutil #数据库驱动和参数配置
DB_DRIVER = "pyPgSQL.PgSQL"
DB_ARGS = {
           'host':'192.168.50.100',
           'database':'beijingdb',
           'port':'9999',
           'user':'bop007',
           'cp_min':5,
           'cp_max':7,
           'cp_reconnect':True
           }

#从数据库连接池中得到连接对象 dbconn
def getDbConn():
    dbConn = adbapi.ConnectionPool(DB_DRIVER, **DB_ARGS)
    return dbConn

来自：http://www.oschina.net/question/91334_11096