螢幕東西太多，需要清屏，在windows的視窗清屏命令是cls，在Python IDLE中的快捷鍵是Ctrl+L

不過這個快捷鍵預設是沒有的，需要進行一些操作

一、將下面的程式碼複製儲存到新建的clearwindow.py中

"""

Clear Window Extension
Version: 0.2

Author: Roger D. Serwy
        [email protected]

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)

二、將這個檔案放在Python X\Lib\idlelib目錄下（X為你的python版本）

三、然後在這個目錄下找到config-extensions.def這個檔案（idle擴充套件的配置檔案），以記事本的方式開啟它

四、開啟config-extensions.def 後在句末加上如下程式碼

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

五、然後儲存退出就可以了。

開啟python的idle，看看options是不是多了一個選項clear shell window ctrl+L

這時ctrl+l就可以實現清屏了