（Python2，Python3 通用）
保存如下代码到 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)
将上述文件保存到 C:\Python27\Lib\idlelib 下。再打开此目录下的 config-extensions.def 文件，在其尾部添加如下代码
################################# >>> Added for clear Window
[ClearWindow]
enable=1
enable_editor=0
enable_shell=1
[ClearWindow_cfgBindings]
clear-window=<Control-Key-l>
好了，现在 IDLE 已经可以支持 Ctrl + l 清屏了。
注意：如果遇到 IDLE 快捷键冲突 (我在 Ubuntu 18.04 的 Python3.6.8 IDLE 中遇到过)，例如 IDLE 默认已经定义了 Ctrl + l 为其它用途快捷键，则可以在 IDLE 菜单 Options -> Configure IDLE -> Keys 重新设定快捷键，如下图：
以上方法同样适用于 Linux。在 Linux 下，上述两个文件应该位于： /usr/lib/python2.7/idlelib 或 /usr/lib/python3.4/idlelib 或 /usr/lib64/python2.7/idlelib
完。