Python中help() 与 dir()

在Python中行走的拐杖：help() 与 dir()

1. 

Python v2.7.1 documentation » The Python Standard Library »

2. Built-in Functions

找到help()

help

([object])
Invoke the built-in help system. (This function is intended for interactive use.) If no argument is given, the interactive help system starts on the interpreter console. If the argument is a string,
then the string is looked up as the name of a module, function, class, method, keyword, or documentation topic, and a help page is printed on the console. If the argument is any other kind of object, a help page on the object
is generated.
This function is added to the built-in namespace by the 

site

 module.

New in version 2.2.

>>>help(dir) 即可

2. dir()

>>>import copy

>>>[n for n in dir(copy) if not n.startswith('_')]

 

Python v2.7.1 documentation » 
The Python Standard Library »

 

Python v2.7.1 documentation » 
The Python Standard Library »