Python中tab键自动补全功能的配置

新手学习Python的时候，如何没有tab键补全功能，我感觉那将是一个噩梦，对于我们这种菜鸟来说，刚接触python，对一切都不了解，还好有前辈们的指导，学习一下，并记录下来，还没有学习这个功能小伙伴们!赶紧get吧!

1.首先我们需要查看python的安装路径

[root@localhost ~]# python

Python 2.6.6 (r266:84292, Oct 12 2012, 14:23:48)

[GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] 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/gst-0.10', '/usr/lib64/python2.6/site-packages/gtk-2.0', '/usr/lib64/python2.6/site-packages/webkit-1.0', '/usr/lib/python2.6/site-packages']

切换目录到python的安装目录下，进行tab键补全模块的编写。

[root@localhost ~]# cd /usr/lib64/python2.6

[root@localhost python2.6]# vim 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

此处我们编写完成后就可以进入python中导入tab键补全

root@localhost python2.6]# python

Python 2.6.6 (r266:84292, Oct 12 2012, 14:23:48)

[GCC 4.4.6 20120305 (Red Hat 4.4.6-4)] on linux2

Type "help", "copyright", "credits" or "license" for more information.

>>> import tab

>>> sys.

sys.__class__( sys.__reduce_ex__( sys.builtin_module_names sys.exitfunc( sys.maxsize sys.setprofile(

sys.__delattr__( sys.__repr__( sys.byteorder sys.flags sys.maxunicode sys.setrecursionlimit(

sys.__dict__ sys.__setattr__( sys.call_tracing( sys.float_info sys.meta_path sys.settrace(

sys.__displayhook__( sys.__sizeof__( sys.callstats( sys.getcheckinterval( sys.modules sys.stderr

sys.__doc__ sys.__stderr__ sys.copyright sys.getdefaultencoding( sys.path sys.stdin

sys.__excepthook__( sys.__stdin__ sys.displayhook( sys.getdlopenflags( sys.path_hooks sys.stdout

sys.__format__( sys.__stdout__ sys.dont_write_bytecode sys.getfilesystemencoding( sys.path_importer_cache sys.subversion

sys.__getattribute__( sys.__str__( sys.exc_clear( sys.getprofile( sys.platform sys.version

sys.__hash__( sys.__subclasshook__( sys.exc_info( sys.getrecursionlimit( sys.prefix sys.version_info

sys.__init__( sys._clear_type_cache( sys.exc_type sys.getrefcount( sys.ps1 sys.warnoptions

sys.__name__ sys._current_frames( sys.excepthook( sys.getsizeof( sys.ps2

sys.__new__( sys._getframe( sys.exec_prefix sys.gettrace( sys.py3kwarning

sys.__package__ sys.api_version sys.executable sys.hexversion sys.setcheckinterval(

sys.__reduce__( sys.argv sys.exit( sys.maxint sys.setdlopenflags(

为了进入python之后不用每次都导入，来进行下边的操作，进入家目录，编写 .bashrc文件在最后添加下面一行，保存退出。

[root@localhost ~]# cd ~

[root@localhost ~]# vim .bashrc

export PYTHONSTARTUP=/usr/lib64/python2.6/tab.py

家目录.bashrc文件只有用户登录时才会加载生效，需要进行下面的操作来生效

[root@localhost ~]# source .bashrc

OK，那么现在我们就可以不用每次进行python之后进行import tab 动作来使tab键补全功能生效了。

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