1.找到Python\PythonX\Lib\idlelib(x為你的版本號)，在當前目錄下添加ClearWindow.py，復制提供的代碼，保存為*.py即可。

 1 class ClearWindow:
 2 
 3     menudefs = [
 4         (‘options‘, [None,
 5                (‘Clear Shell Window‘, ‘<<clear-window>>‘),
 6        ]),]
 7 
 8     def __init__(self, editwin):
 9         self.editwin = editwin
 
10         self.text = self.editwin.text
11         self.text.bind("<<clear-window>>", self.clear_window2)
12 
13         self.text.bind("<<undo>>", self.undo_event)  # add="+" doesn‘t work
14 
15     def undo_event(self, event):
16         text = self.text
17         
18         text.mark_set("
 
iomark2", "iomark")
19         text.mark_set("insert2", "insert")
20         self.editwin.undo.undo_event(event)
21 
22         # fix iomark and insert
23         text.mark_set("iomark", "iomark2")
24         text.mark_set("insert", "insert2")
25         text.mark_unset("iomark2")
26         text.mark_unset("
 
insert2")
27         
28 
29     def clear_window2(self, event): # Alternative method
30         # work around the ModifiedUndoDelegator
31         text = self.text
32         text.undo_block_start()
33         text.mark_set("iomark2", "iomark")
34         text.mark_set("iomark", 1.0)
35         text.delete(1.0, "iomark2 linestart")
36         text.mark_set("iomark", "iomark2")
37         text.mark_unset("iomark2")
38         text.undo_block_stop()
39         if self.text.compare(‘insert‘, ‘<‘, ‘iomark‘):
40             self.text.mark_set(‘insert‘, ‘end-1c‘)
41         self.editwin.set_line_and_column()
42 
43     def clear_window(self, event):
44         # remove undo delegator
45         undo = self.editwin.undo
46         self.editwin.per.removefilter(undo)
47 
48         # clear the window, but preserve current command
49         self.text.delete(1.0, "iomark linestart")
50         if self.text.compare(‘insert‘, ‘<‘, ‘iomark‘):
51             self.text.mark_set(‘insert‘, ‘end-1c‘)
52         self.editwin.set_line_and_column()
53 
54         # restore undo delegator
55         self.editwin.per.insertfilter(undo)

2.在當前目錄下找到config-extensions.def 並修改，在末尾添加如下代碼：

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

3. 重新打開IDEL即可，如果快捷鍵無效的話，註意查看ClearWindow.py的大小寫以及配置文件內容的大小寫狀態

python的IDEL編輯器清屏文件配置