python IDLE 清屏功能扩展

最新推荐文章于 2022-09-08 00:22:59 发布

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本文介绍如何在Python的IDLE环境中安装和使用ClearWindow插件，实现清屏功能并保留撤销操作。通过三步简单操作，即可在IDLE中添加快捷清屏功能，提升编程效率。

第一步：在 C:\Python37\Lib\idlelib 目录下新建ClearWindow.py文件，将一下代码复制到文件中

"""

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)

第二步：在刚才的目录下找到configextensions.def配置文件并打开，将下面代码复制到最后面，保存退出

[ClearWindow]
enable=1
enable_editor=0
enable_shell=1
[ClearWindow_cfgBindings]
clear-window=<Control-Key-l>

第三步：重新打开IDLE，看看工具栏中的options选项下是不是多了一个clear shell window Ctrl + L

如果是证明你成功了，如果没有回去检查下ClearWindow文件是不是小写命名的，注意大写。

之后可以使用快捷键 Ctrl + L 进行清屏了，是不是很方便 :D)