（一）系统环境：
OS：centos 6.5final
Python: 2.6.6
(二）步骤：
1，写一个Python自动补全脚本首先readline和rlcompleter模块具体如下：，
[root@zabbix python2.6]# vim tab.py
#!/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默认的模块的存放路径，有下可知默认的路径/usr/lib/python2.6/
[root@zabbix ~]# python
Python 2.6.6 (r266:84292, Jul 23 2015, 15:22:56)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg', '/usr/lib/python2.6/site-packages/pip-1.5.4-py2.6.egg', '/usr/lib64/python26.zip', '/usr/lib64/python2.6', '/usr/lib64/python2.6/plat-linux2', '/usr/lib64/python2.6/lib-tk', '/usr/lib64/python2.6/lib-old', '/usr/lib64/python2.6/lib-dynload', '/usr/lib64/python2.6/site-packages', '/usr/lib64/python2.6/site-packages/gtk-2.0', '/usr/lib/python2.6/site-packages']
>>>
默认的路径/usr/lib/python2.6/
3，拷贝上边的脚本到该路径下
[root@zabbix site-packages]# cp tab.py /usr/lib/python2.6/
4，导入该模块即可以使用了。
>>> import tab
>>> sys.
sys.__class__( sys.api_version sys.hexversion
sys.__delattr__( sys.argv sys.maxint
sys.__dict__ sys.builtin_module_names sys.maxsize
sys.__displayhook__( sys.byteorder sys.maxunicode
sys.__doc__ sys.call_tracing( sys.meta_path
sys.__egginsert sys.callstats( sys.modules
sys.__excepthook__( sys.copyright sys.path
sys.__format__( sys.displayhook( sys.path_hooks
sys.__getattribute__( sys.dont_write_bytecode sys.path_importer_cache
sys.__hash__( sys.exc_clear( sys.platform
sys.__init__( sys.exc_info( sys.prefix
sys.__name__ sys.exc_type sys.ps1
sys.__new__( sys.excepthook( sys.ps2
sys.__package__ sys.exec_prefix sys.py3kwarning
