import pyodbc
    try:
        connection = pyodbc.connect(driver='SQL Server Native Client 10.0',host=nHost,database='',trusted_connection='yes',autocommit=True)
        cursor = connection.cursor()
        qry = r"""RESTORE DATABASE %s
            FROM DISK = '%s'
            WITH RECOVERY,
            MOVE 'w7_Data' TO 'C:\MSSQL\v7t_tss.mdf', 
            MOVE 'w7_Log' TO 'C:\MSSQL\v7t_tss_log.ldf',
            REPLACE
            """ % (nBase,nFileName)
        print qry
        cursor.execute(qry)
        connection.close()
        print 'restore ok'
        return ''
    except Exception as e:
        print e
        return str(e)