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
#!/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

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