python添加tab键提示

#!/usr/bin/python

import sys
import readline
import rlcompleter
import atexit
import os
readline.parse_and_bind(‘tab:complete‘)
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