Python启动文件，为REPL添加自动补全以及历史功能

startup.py

import rlcompleter
import readline
import atexit
import os

# http://stackoverflow.com/questions/7116038/python-tab-completion-mac-osx-10-7-lion
if 'libedit' in readline.__doc__:
    readline.parse_and_bind('bind ^I rl_complete')
else:
    readline.parse_and_bind('tab: complete')

histfile = os.path.join(os.environ['HOME'], '.emacs.d', 'history', 'python')
try:
    readline.read_history_file(histfile)
except IOError:
    pass
atexit.register(readline.write_history_file, histfile)

del readline, rlcompleter, histfile, os