寻找一种更Python化的方式来访问数据库 [英] looking for a more pythonic way to access the database

问题描述

我有一堆遵循这种模式的python方法:

I have a bunch of python methods that follow this pattern:

def delete_session(guid):
    conn = get_conn()
    cur = conn.cursor()

    cur.execute("delete from sessions where guid=%s", guid)

    conn.commit()
    conn.close()

是否存在更多的Python方式来执行原始sql.每种方法开头和结尾的两行都开始困扰我.

Is there a more pythonic way to execute raw sql. The 2 lines at the beginning and end of every method are starting to bother me.

我不是在寻找orm，我想坚持使用原始sql.

I'm not looking for an orm, I want to stick with raw sql.

推荐答案

您可以编写上下文管理器并使用with语句.例如，请参阅此博客文章:

You could write a context manager and use the with statement. For example, see this blog post:

http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/

此外，python文档中的示例非常符合您的需求.请参阅此页面上的8.1节，尤其是开头的代码段:

Also the python documentation has a sample that pretty much matches your needs. See section 8.1 on this page, in particular the snippet that begins:

db_connection = DatabaseConnection()
with db_connection as cursor:
    cursor.execute('insert into ...')
    cursor.execute('delete from ...')
    # ... more operations ...

• https://docs.python.org/2.5/whatsnew/pep -343.html
• https://docs.python.org/2.5/whatsnew/pep-343.html

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