Python模块和函数的快速查看

如果想查看某个模块提供了哪些函数等，我们可以进入python控制台，然后导入模块，再使用help(模块名)来查看这个模块的功能有哪些。

以string模块为例：

>>> import string
>>> help(string)

Help on module string:

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

FILE
/usr/lib/python2.7/string.py

MODULE DOCS http://docs.python.org/library/string
DESCRIPTION
Warning: most of the code you see here isn't normally used nowadays.
Beginning with Python 1.6, many of these functions are implemented as
methods on the standard string object. They used to be implemented by
a built-in module called strop, but strop is now obsolete itself.

Public module variables:

whitespace -- a string containing all characters considered whitespace
lowercase -- a string containing all characters considered lowercase letters
uppercase -- a string containing all characters considered uppercase letters
letters -- a string containing all characters considered letters
:

如果想查看某一个具体的函数，可以使用help(函数名）：

>>>help(format)

Help on built-in function format in module __builtin__:

format(...)
format(value[, format_spec]) -> string

Returns value.__format__(format_spec)
format_spec defaults to ""