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  
  ""