新手必学的使用命令行实现tab键自动补全功能

具体实现步骤如下

1.编写具体的实现tab补全功能的脚本，名为tab.py

#!/usr/bin/python   
# python tab complete   

import sys   
import readline   
import rlcompleter   
import atexit   
import os   
# tab completion   
readline.parse_and_bind('tab: complete')   
# history file   
histfile = os.path.join(os.environ['HOME'], '.pythonhistory')   
try:   
    readline.read_history_file(histfile)   
except IOError:   
    pass   
atexit.register(readline.write_history_file, histfile)   

del os, histfile, readline, rlcompleter

2.查看当前服务器python的模块路径

>>> import sys  
>>> sys.path  
['', '/usr/lib64/python27.zip', '/usr/lib64/python2.7', '/usr/lib64/python2.7/plat-linux2',
 '/usr/lib64/python2.7/lib-tk', '/usr/lib64/python2.7/lib-old', '/usr/lib64/python2.7/lib-dynload', 
 '/usr/lib64/python2.7/site-packages', '/usr/lib/python2.7/site-packages']  
>>>

python的模块放在了/usr/lib64/python27下面，将脚本拷贝到该目录下，在使用时导入即可。

3.导入tab

>>> import tab

>>> import os

>>> os.

Display all 249 possibilities? (y or n)

4.但python读取模块的路径顺序优先是从当前目录开始，所以若是当前目录也存在tab.py，但内容不同的python脚本，则可能会报错，所以在环境变量中也指定tab.py脚本

#for python  
export PYTHONSTARTUP=/usr/lib64/python2.7/tab.py