Linux下Python模式，Tab自动补全
在Python模式交互下，tab自动补全会提高代码效率，通过以下步骤可以很方便的实现自动补全。
1.获取操作目录
[root@liu site-packages]# 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']
>>>
可以看出，我的工作目录是/usr/lib/python2.6/site-packages/。
2.进入工作目录，编写tab.py补全文件
[root@liu site-packages]# cd /usr/lib/python2.6/site-packages/
[root@liu site-packages]# vim tab.py
tab.py内容如下，建议粘贴的时候保证格式正确性
#!/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
3.添加环境变量，使其生效
[root@liu site-packages]# cd
[root@liu ~]# vim .bashrc
在末尾添加一行
export PYTHONSTARTUP=/usr/lib/python2.6/site-packages/tab.py
4.重读.bashrc文件
source .bashrc
或者
. .bashrc
5.测试效果
[root@liu ~]# 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 math
>>> math. <tab>
math.__class__( math.acos( math.fsum(
.......
完成。我一开始一直报错，然后通过排查就是因为tab.py格式不正确。注意其格式。
