python IDLE清屏

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作者：金gordon

链接：http://www.zhihu.com/question/20917976/answer/32876441

来源：知乎

1、下载ClearWindow.py（在文章最后注明，复制粘贴）。

2、拷贝ClearWindow.py文件，放在Python安装目录Python XXX\Lib\idlelib下面（XXX为你的python版本）。

3、记事本打开Python XXX\Lib\idlelib目录下的config-extensions.def（IDLE扩展的配置文件）， 为防止出错，你可以在打开它之前先copy一个备份 。

4、修改config-extensions.def ，在末尾添加如下内容，然后保存退出：

[ClearWindow]

enable=1

enable_editor=0

enable_shell=1

[ClearWindow_cfgBindings]

clear-window=<Control-Key-;>

5、打开Python的IDLE，options选项中就可以看到增加了Clear shell window ctrl+;。

6、在IDLE输入代码，然后按Ctrl+;（是指Ctrl和;），发现刚输入代码可以被清除了。

注：ClearWindow.py

"""

Clear Window Extension
Version: 0.2

Author: Roger D. Serwy
roger.serwy@gmail.com

Date: 2009-06-14

It provides "Clear Shell Window" under "Options"
with ability to undo.

Add these lines to config-extensions.def

[ClearWindow]
enable=1
enable_editor=0
enable_shell=1
[ClearWindow_cfgBindings]
clear-window=<Control-Key-l>

"""

class ClearWindow:

menudefs = [
('options', [None,
('Clear Shell Window', '<<clear-window>>'),
]),]

def __init__(self, editwin):
self.editwin = editwin
self.text = self.editwin.text
self.text.bind("<<clear-window>>", self.clear_window2)

self.text.bind("<<undo>>", self.undo_event)  # add="+" doesn't work

def undo_event(self, event):
text = self.text

text.mark_set("iomark2", "iomark")
text.mark_set("insert2", "insert")
self.editwin.undo.undo_event(event)

# fix iomark and insert
text.mark_set("iomark", "iomark2")
text.mark_set("insert", "insert2")
text.mark_unset("iomark2")
text.mark_unset("insert2")

def clear_window2(self, event): # Alternative method
# work around the ModifiedUndoDelegator
text = self.text
text.undo_block_start()
text.mark_set("iomark2", "iomark")
text.mark_set("iomark", 1.0)
text.delete(1.0, "iomark2 linestart")
text.mark_set("iomark", "iomark2")
text.mark_unset("iomark2")
text.undo_block_stop()
if self.text.compare('insert', '<', 'iomark'):
self.text.mark_set('insert', 'end-1c')
self.editwin.set_line_and_column()

def clear_window(self, event):
# remove undo delegator
undo = self.editwin.undo
self.editwin.per.removefilter(undo)

# clear the window, but preserve current command
self.text.delete(1.0, "iomark linestart")
if self.text.compare('insert', '<', 'iomark'):
self.text.mark_set('insert', 'end-1c')
self.editwin.set_line_and_column()

# restore undo delegator
self.editwin.per.insertfilter(undo)