Python-IDLE实现清屏

 1、将下面文件复制到命名为ClearWindow.py的文件下，移动到 …Python\Python36-32\Lib\idlelib下。
 ###################################################################################
 """

 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、接下来就是要在 …Python\Python36-32\Lib\idlelib文件夹下，用记事本打开文件config-extensions.def，在文件最后添加一下代码：
 [ClearWindow]
 enable=1
 enable_editor=0
 enable_shell=1
 [ClearWindow_cfgBindings]
 clear-window=<Control-Key-l>