在Python IDLE中實現清屏

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

"""

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="""
class
clearwindow:
menudefs = [
('options', [none,
('clear shell window', '<>'),
]),]
def__init__
(self, editwin):
self.editwin = editwin
self.text = self.editwin.text
self.text.bind("<>", self.clear_window2)
self.text.bind("<>", self.undo_event)  # add="+" doesn't work
defundo_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")
defclear_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', '
self.text.mark_set('insert', 'end-1c')
self.editwin.set_line_and_column()
defclear_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', '
self.text.mark_set('insert', 'end-1c')
self.editwin.set_line_and_column()
# restore undo delegator
self.editwin.per.insertfilter(undo)

[clearwindow]

enable=1
enable_editor=0
enable_shell=1
[clearwindow_cfgbindings]
clear-window=

這時ctrl+l就可以實現清屏了

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