python中的tab补全功能添加

用Python时没有tab补全还是挺痛苦的，记录一下添加该功能的方法利人利己

1. 先准备一个tab.py的脚本

shell> cat 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默认的模块存放地址

[root@localhost ~]# python
Python 2.6.6 (r266:84292, Nov 22 2013, 12:16:22)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/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', '/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg-info']

3. 拷贝该脚本到默认模块存放路径

cp tab.py  /usr/lib64/python2.6/

4. 现在可以用了

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