pymssql 报20002错误解决办法：DB-Lib error message 20002, severity 9-526互联

python 版本：3.6 win32 版本（因为一些特殊原因必须使用3.6）

pymssql 版本：2.2.0

连接数据库：

    import  pymssql
**
    def InitMssql(self):
        try:
            host = self.IniConfig.get('default','dbhost',"host***")
            user=  self.IniConfig.get('default','dbuser',"dbs***")
            password =  self.IniConfig.get('default','dbpassword',"pwd***")
            database =  self.IniConfig.get('default','dbdatabase',"db***")
            #self.DBconn = pymssql.connect(host,user,password,database,charset="GBK")
            self.DBconn = pymssql.connect(host,user,password,database)
            self.DBcursor = self.DBconn.cursor()
            sql = "SET TEXTSIZE 2147483647"
            self.DBcursor.execute(sql)
            self.DBconn.commit()
        except Exception as ex:
            if self.DBconn: self.DBconn.rollback()
            raise ex

报错信息如下：

2023-11-19 22:27:06,374 - (20002, b'DB-Lib error message 20002, severity 9:\n
Adaptive Server connection failed (www.***.com)\n
DB-Lib error message 20002, severity 9:\nAdaptive Server connection failed (www.***.com)\n')
Traceback (most recent call last):
  File "src\\pymssql\\_pymssql.pyx", line 647, in pymssql._pymssql.connect
  File "src\\pymssql\\_mssql.pyx", line 2109, in pymssql._mssql.connect
  File "src\\pymssql\\_mssql.pyx", line 701, in pymssql._mssql.MSSQLConnection.__init__
  File "src\\pymssql\\_mssql.pyx", line 1818, in pymssql._mssql.maybe_raise_MSSQLDatabaseException
  File "src\\pymssql\\_mssql.pyx", line 1835, in pymssql._mssql.raise_MSSQLDatabaseException
pymssql._mssql.MSSQLDatabaseException: (20002, b'DB-Lib error message 20002, severity 9:\n
Adaptive Server connection failed (www.*****.com)\n
DB-Lib error message 20002, severity 9:\n
Adaptive Server connection failed (www.*****.com)\n')

During handling of the above exception, another exception occurred: