python命令行添加自动补全和命令历史功能

# python startup file
import readline
import rlcompleter
import atexit
import os
# tab completion
readline.parse_and_bind('tab: complete')
# history file
# win
histfile = os.path.join(os.environ['HOMEPATH'], '.pythonhistory')
# linux
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

将以上文件保存为.pythonstartup并存放在用户的主目录下，window放在C:\Users\Administrator下，linux放在/root或者/home/xxx目录下，然后设置环境变量

linux中export PYTHONSTARTUP=~/.pythonstartup

windows中一样，打开控制面板\系统和安全\系统,高级系统设置，环境变量，新建系统变量，变量名为PYTHONSTARTUP，变量值为之前的文件

python3中需要安装pyreadline，pip install pyreadline

linux和window中需要修改下HOME,HOMEPATH