July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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116
｜
第
6
章
2. PostgreSQL
和
Python
如果你熟悉
PostgreSQL
（或正在学习
PostgreSQL
），想要使用
PostgreSQL
数据库，那么用
Python
连接
PostgreSQL
也是很容易的。你也只需要做两步：安装驱动程序，用
Python
连接。
Python
的
PostgreSQL
驱动程序有很多（
https://wiki.postgresql.org/wiki/Python
），但最流行
的是
Psycopg
（
http://initd.org/psycopg/
）。 在
Psycopg
的安装页面（
http://initd.org/psycopg/
docs/install.html
）中详细介绍了如何在电脑上运行
Psycopg
，在
PostgreSQL
网站上也有关于
Python
如何使用
Psycopg
的详细介绍（
https://wiki.postgresql.org/wiki/Psycopg2_Tutorial
）。
6.7.2
非关系型数据库
：
NoSQL
比方说，你喜欢使用数据库这个主意，但映射出所有关系会让你抓狂。可能只是因为你目
前没有真正理解数据的连接方式，也可能是因为你用的是平面数据（
flat data
，也就是说，
不必良好映射的无关系数据），或者也可能是因为你对学习
SQL
没有更强烈的兴趣。幸运
的是，还有一种适合你的数据库。
NoSQL
以及其他非关系型数据库将数据保存成平面格式（
flat format
），通常是
JSON
格
式。我们在第
3
章中说过，
JSON
查找信息的方法很简单。回到上一节关于我朋友的数据， ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.