比较喜欢python的装饰器, 试了下一种用法，通过装饰器来传递sql，并执行返回结果
这个应用应该比较少
为了方便起见，直接使用了ironpython, 连接的mssql server

# -*- coding: utf-8 -*-
import clr
clr.AddReference('System.Data')
from System.Data import *
from functools import wraps

conn_str = "server=localhost;database=DB_TEST;uid=sa;password=sa2008"

def mssql(sql):
    def handler_result(rs):
        rst = []
        while rs.Read():
            rst.Add(rs[0])
        return rst


    def decorator(fn):
        @wraps(fn)
        def wrapper(*args, **kwargs):
            TheConnection = SqlClient.SqlConnection(conn_str)
            TheConnection.Open()
            try:
                MyAction = SqlClient.SqlCommand(sql, TheConnection)
                MyReader = MyAction.ExecuteReader()
            except Exception,ex:
                raise AssertionError(ex)
            rst_data = handler_result(MyReader)
            kwargs["sql_rst"] = rst_data
            result = fn(*args, **kwargs)
            MyReader.Close()
            TheConnection.Close()
            return result
        return wrapper
    return decorator



@mssql(sql="Select getdate()")
def get_data(sql_rst=""):
    print sql_rst[0]

get_data()

算是为了好玩吧，回看了下，可能实际用的机会不多