python 命令行里实现clear清屏技巧

   对于不少新手，固然我也是新手，在命令行里学习python的时候占满了屏幕，很不习惯，特别是使用linux习惯了，使用clear清屏，这样的感受很是好，可是python下面没有这样的命令和功能，下面为了解决这个问题，本人写了个简单的模块

1 先来看下没有清屏的结果

[root@zh ~]# python
Python 2.6.6 (r266:84292, Nov 22 2013, 12:11:10)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>

这样特别让人厌恶，至少我有这样的感受

2 解决办法

[root@zh ~]# cat clear.py
#!/usr/bin/python
import os
def clear():
    os.system('clear')

3 为了更使用方便，咱们不用每次都使用import导入

[root@zh ~]# cat startup.py
#!/usr/bin/python
# python startup file
                                                                                                   
import sys
import readline
import rlcompleter
import atexit
import os
import clear
# 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

  你们留意看下import clear   我上面这个脚本是python的tab功能

4  设置环境变量

del os, histfile, readline, rlcompleter
[root@zh ~]# cat .bashrc
# .bashrc
# User specific aliases and functions
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
export PYTHONSTARTUP=/root/startup.py
# Source global definitions
if [ -f /etc/bashrc ]; then
        . /etc/bashrc
fi
[root@zh ~]# source .bashrc
[root@zh ~]#

5  测试

[root@zh ~]# python
Python 2.6.6 (r266:84292, Nov 22 2013, 12:11:10)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> clear.clear()
>>>

 这里的效果贴出来不明显，你们动手试下，不懂的话能够在下面留言