python tab补全

看视频发现讲课的老师python可以tab补全，网上找了一段代码
如下：

[root@node01 data]#vi tab.py

 1 #!/usr/bin/env python
 2 # python startup file 
 3 import sys
 4 import readline
 5 import rlcompleter
 6 import atexit
 7 import os
 8 # tab completion 
 9 readline.parse_and_bind('tab: complete')
10 # history file 
11 histfile = os.path.join(os.environ['HOME'], '.pythonhistory')
12 try:
13     readline.read_history_file(histfile)
14 except IOError:
15     pass
16 atexit.register(readline.write_history_file, histfile)
17 del os, histfile, readline, rlcompleter

拷贝到python命令路径

[root@node01 data]#cp tab.py /usr/lib64/python2.6

导入

[root@node01 data]# python
Python 2.6.6 (r266:84292, Aug 18 2016, 15:13:37)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tab
>>> import sys
>>> sys.p
sys.path sys.platform sys.ps2
sys.path_hooks sys.prefix sys.py3kwarning
sys.path_importer_cache sys.ps1