1 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。
2 ###################################################################################
3 """
4
5 Clear Window Extension
6 Version: 0.2
7
8 Author: Roger D. Serwy
9 roger.serwy@gmail.com
10
11 Date: 2009-06-14
12
13 It provides "Clear Shell Window" under "Options"
14 with ability to undo.
15
16 Add these lines to config-extensions.def
17
18 [ClearWindow]
19 enable=1
20 enable_editor=0
21 enable_shell=1
22 [ClearWindow_cfgBindings]
23 clear-window=<Control-Key-l>
24
25
26 """
27
28 class ClearWindow:
29
30 menudefs = [
31 ('options', [None,
32 ('Clear Shell Window', '<<clear-window>>'),
33 ]),]
34
35 def __init__(self, editwin):
36 self.editwin = editwin
37 self.text = self.editwin.text
38 self.text.bind("<<clear-window>>", self.clear_window2)
39
40 self.text.bind("<<undo>>", self.undo_event) # add="+" doesn't work
41
42 def undo_event(self, event):
43 text = self.text
44
45 text.mark_set("iomark2", "iomark")
46 text.mark_set("insert2", "insert")
47 self.editwin.undo.undo_event(event)
48
49 # fix iomark and insert
50 text.mark_set("iomark", "iomark2")
51 text.mark_set("insert", "insert2")
52 text.mark_unset("iomark2")
53 text.mark_unset("insert2")
54
55
56 def clear_window2(self, event): # Alternative method
57 # work around the ModifiedUndoDelegator
58 text = self.text
59 text.undo_block_start()
60 text.mark_set("iomark2", "iomark")
61 text.mark_set("iomark", 1.0)
62 text.delete(1.0, "iomark2 linestart")
63 text.mark_set("iomark", "iomark2")
64 text.mark_unset("iomark2")
65 text.undo_block_stop()
66 if self.text.compare('insert', '<', 'iomark'):
67 self.text.mark_set('insert', 'end-1c')
68 self.editwin.set_line_and_column()
69
70 def clear_window(self, event):
71 # remove undo delegator
72 undo = self.editwin.undo
73 self.editwin.per.removefilter(undo)
74
75 # clear the window, but preserve current command
76 self.text.delete(1.0, "iomark linestart")
77 if self.text.compare('insert', '<', 'iomark'):
78 self.text.mark_set('insert', 'end-1c')
79 self.editwin.set_line_and_column()
80
81 # restore undo delegator
82 self.editwin.per.insertfilter(undo)
83 ###################################################################################
84 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：
85 [ClearWindow]
86 enable=1
87 enable_editor=0
88 enable_shell=1
89 [ClearWindow_cfgBindings]
90 clear-window=<Control-Key-l>
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