一、查看Python安装路径
[root@controller ~]# python
Python 2.7.5 (default, Nov 20 2015, 02:00:19)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 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']
二、切换目录到python的安装目录下，进行tab键补全模块的编写
[root@controller ~]# cd /usr/lib64/python2.7/
[root@controller python2.7]# vim tab.py
#!/usr/bin/env python
# python startup file
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
三、避免进入python之后，不用每次都导入tab模块
###进入家目录，编写 .bashrc文件在最后添加下面一行，保存退出###
[root@controller ~]#vim .bashrc
export PYTHONSTARTUP=/usr/lib64/python2.7/tab.py
###家目录.bashrc文件只有用户登录时才会加载生效，需要进行下面的操作来生效###
[root@controller ~]#source .bashrc
OK，那么现在我们就可以不用每次进行python之后进行import tab 动作来使tab键补全功能生效了。
