• for linux

#!/usr/bin/env python # python startup file import sysimport readlineimport rlcompleterimport atexitimport 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)except IOError:    passatexit.register(readline.write_history_file, histfile)del os, histfile, readline, rlcompleter

把上面代码保存为tab.py放置在当前系统全局环境变量下，可以使用print(sys.path)查看，如：/usr/lib64/python2.6/site-packages

• for mac

import sysimport readlineimport rlcompleterif sys.platform == 'darwin' and sys.version_info[0] == 2:    readline.parse_and_bind("bind ^I rl_complete")else:    readline.parse_and_bind("tab: complete")  # linux and python3 on macfor mac