1.创建tab.py
[root@node6 files]# cat tab.py
#!/usr/bin/env python 
# python startup 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
[root@node6 files]# python
Python 2.7.8 (default, Dec 29 2016, 11:45:52) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 
>>> import sys
>>> sys.path
['', '/usr/local/lib/python2.7/site-packages/setuptools-7.0-py2.7.egg', '/usr/local/lib/python2.7/site-packages/MarkupSafe-0.9.3-py2.7-linux-x86_64.egg', '/usr/local/lib/python2.7/site-packages/paramiko-1.15.1-py2.7.egg', '/usr/local/lib/python2.7/site-packages/simplejson-3.6.5-py2.7-linux-x86_64.egg', '/usr/local/lib/python2.7/site-packages/ansible-2.0.0.0-py2.7.egg', '/usr/local/lib/python2.7/site-packages/Jinja2-2.8-py2.7.egg', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-linux2', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages']
3. 拷贝该脚本到默认模块存放路径
[root@node6 files]# cp tab.py /usr/local/lib/python2.7
4. 测试
[root@node6 files]# python
Python 2.7.8 (default, Dec 29 2016, 11:45:52) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tab
>>> import sys
>>> sys.
sys.__class__(              sys.__stdout__              sys.exit(                   sys.path_hooks
sys.__delattr__(            sys.__str__(                sys.exitfunc(               sys.path_importer_cache
sys.__dict__                sys.__subclasshook__(       sys.flags                   sys.platform
sys.__displayhook__(        sys._clear_type_cache(      sys.float_info              sys.prefix
sys.__doc__                 sys._current_frames(        sys.float_repr_style        sys.ps1
sys.__egginsert             sys._getframe(              sys.getcheckinterval(       sys.ps2
sys.__excepthook__(         sys._mercurial              sys.getdefaultencoding(     sys.py3kwarning
sys.__format__(             sys.api_version             sys.getdlopenflags(         sys.setcheckinterval(
sys.__getattribute__(       sys.argv                    sys.getfilesystemencoding(  sys.setdlopenflags(
sys.__hash__(               sys.builtin_module_names    sys.getprofile(             sys.setprofile(
sys.__init__(               sys.byteorder               sys.getrecursionlimit(      sys.setrecursionlimit(
sys.__name__                sys.call_tracing(           sys.getrefcount(            sys.settrace(
sys.__new__(                sys.callstats(              sys.getsizeof(              sys.stderr