Python 实现清屏

使用Python的IDLE到某个程序节点时,需要清屏以提高清晰度.

但IDLE本身并没有这个功能,我们可以通过扩展来实现类似于Ctrl + L的清屏

资料来自于百度经验的 BinnLZeng

先制作一个python文件ClearWindow.py

#File Name:ClearWindow.py
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_window)

    def clear_window2(self, event): 
    # Alternative method
    # work around the ModifiedUndoDelegator
        text = self.text
        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")
        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)

然后,将该文件move至 {PYTHON_HOME}\Lib\idlelib中

修改config-extensions.def文件

在末尾添加

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

来解释下什么意思

enable=1

#1为真 意思就是启用这个扩展

enable_editor=0

#编辑器禁用这个扩展

enable_shell=1

#IDLE Shell启动扩展

clear-window=<Control-Key-l>

#设置快捷键为Ctrl + L

---------------------------分割线-----------------------

再打开IDLE

点击Options，可以看到我们的扩展被成功加载。

同样，我们可以按下Ctrl + L进行清屏操作。我们还可以通过clear-window=<Control-Key-l>修改快捷键，例如修改为ctrl + 3，则是clear-window=<Control-Key-3>