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[译]三个有用的python方法：dir, help 和 pprint

九月 29th, 2008 by Soloman |

| 796 views

Python提供了三个方便的函数，可以使我们直接从解释器中就获得对象的文档。

dir - 列出一个对象的所有方法和属性
help - 用来显示文档
pprint - 非常棒的一个打印库，可以将对象的内容用易阅读的格式打印出来

下面的例子能让你更清楚它们的使用：

PythonWin 2.2.1 (#34, Apr 15 2002, 09:51:39)...
>>> import string
>>> dir(string)
['_StringType', '__builtins__', '__doc__',...]
>>> help(string)
Help on module string:

NAME
    string - A collection of string operations (most are no longer used in Python 1.6).

FILE
    d:\python22\lib\string.py

DESCRIPTION
    Warning: most of the code you see here isn’t normally used nowadays.  With
    Python 1.6, many of these functions are implemented as methods on the
    standard string object. 

...

>>> from pprint import pprint
>>> pprint(dir(string))
['_StringType',
 '__builtins__',
 '__doc__',
 '__file__',
...

简单且方便，不是吗？

本文翻译并转载自这里。

dir, help, pprint, Python

This entry was posted on 星期一, 九月 29th, 2008 at 16:21 and is filed under 编程与开发平台. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.