python自动补全

修改环境变量.bashrc或.zshrc：

PYTHONSTARTUP='/home/users/xx/.pythonstartup'
export PYTHONSTARTUP

写入.pythonstartup文件

try:
    import readline
except ImportError:
    print " readline not available"
else:
    import rlcompleter
    readline.parse_and_bind("tab: complete")