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)
exceptIOError:
    pass
atexit.register(readline.write_history_file, histfile)
del os, histfile, readline, rlcompleter

放在/usr/lib/python2.7/site-packages/下

在python中输入 ‘import tab’ 引用