如何清空PythonShell的内容？

1、下载ClearWindow.py

代码为一下内容，保存为ClearWindow就可以了

"""

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)

2、将ClearWindow.py文件放在Python的安装目录

Python XXX=>Lib=>idlelib下面（XXX为你的python版本）

3、以记事本的方式打开该目录下的一个叫config-extensions.def(IDLE扩展的配置文件)

4、修改config-extensions.def,在末尾添加如下内同，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。