1.先准备一个tab.py的脚本

#!usr/bin/python
# python tab file
import sys
import readline
import rlcompleter
import atexit
import 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:pass
atexit.register(readline.write_history_file, histfile)del os, histfile, readline, rlcompleter

2.查看Python默认的模块存放地址

➜  xushukui python
Python 2.7.12 (default, Nov 19 2016, 06:48:10)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/local/lib/python2.7/dist-packages/greenlet-0.4.12-py2.7-linux-x86_64.egg', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/gtk-2.0']
>>> 

3.拷贝该脚本到默认模块存放路径
cp tab.py /usr/lib/python2.7

4.然后可以用了

>>> import tab
>>> import sys
>>> sys.
sys.__class__(              sys._multiarch              sys.gettrace(
sys.__delattr__(            sys.api_version             sys.hexversion
sys.__dict__                sys.argv                    sys.long_info
sys.__displayhook__(        sys.builtin_module_names    sys.maxint
sys.__doc__                 sys.byteorder               sys.maxsize
sys.__egginsert             sys.call_tracing(           sys.maxunicode
sys.__excepthook__(         sys.callstats(              sys.meta_path
sys.__format__(             sys.copyright               sys.modules
sys.__getattribute__(       sys.displayhook(            sys.path
sys.__hash__(               sys.dont_write_bytecode     sys.path_hooks
sys.__init__(               sys.exc_clear(              sys.path_importer_cache
sys.__name__                sys.exc_info(               sys.platform
sys.__new__(                sys.exc_type                sys.prefix
sys.__package__             sys.excepthook(             sys.ps1
sys.__plen                  sys.exec_prefix             sys.ps2
sys.__reduce__(             sys.executable              sys.py3kwarning
sys.__reduce_ex__(          sys.exit(                   sys.pydebug
sys.__repr__(               sys.exitfunc(               sys.setcheckinterval(
sys.__setattr__(            sys.flags                   sys.setdlopenflags(
sys.__sizeof__(             sys.float_info              sys.setprofile(
sys.__stderr__              sys.float_repr_style        sys.setrecursionlimit(
sys.__stdin__               sys.getcheckinterval(       sys.settrace(
sys.__stdout__              sys.getdefaultencoding(     sys.stderr
sys.__str__(                sys.getdlopenflags(         sys.stdin
sys.__subclasshook__(       sys.getfilesystemencoding(  sys.stdout
sys._clear_type_cache(      sys.getprofile(             sys.subversion
sys._current_frames(        sys.getrecursionlimit(      sys.version
sys._getframe(              sys.getrefcount(            sys.version_info
sys._mercurial              sys.getsizeof(              sys.warnoptions