• Python IDLE 增加清屏功能


    (Python2,Python3 通用)

    保存如下代码到 ClearWindow.py

    """
    
    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)
     
    

    将上述文件保存到 C:Python27Libidlelib 下。再打开此目录下的 config-extensions.def 文件,在其尾部添加如下代码

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

    好了,现在 IDLE 已经可以支持 Ctrl + l 清屏了。

    注意:如果遇到 IDLE 快捷键冲突 (我在 Ubuntu 18.04 的 Python3.6.8 IDLE 中遇到过),例如 IDLE 默认已经定义了 Ctrl + l 为其它用途快捷键,则可以在 IDLE 菜单 Options -> Configure IDLE -> Keys 重新设定快捷键,如下图:

     

    以上方法同样适用于 Linux。在 Linux 下,上述两个文件应该位于: /usr/lib/python2.7/idlelib  或  /usr/lib/python3.4/idlelib    /usr/lib64/python2.7/idlelib

     完。

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  • 原文地址:https://www.cnblogs.com/gaowengang/p/6820144.html
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