Python IDLE清空窗口

使用Python IDLE时发现并没有清空当前窗口的快捷键,也没有像 clear 这样的命令,使用非常不便。

新建一个 ClearWindow.py脚本,源码如下:

"""

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

    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)

拷贝ClearWindow.py文件,放在Python安装目录Python XXX\Lib\idlelib下面(XXX为你的python版本,比如2.7)。

记事本打开Python XXX\Lib\idlelib目录下的config-extensions.def(IDLE扩展的配置文件), 为防止出错,你可以在打开它之前先copy一个备份 。

修改config-extensions.def ,在末尾添加如下内容,然后保存退出:

[ClearWindow]
enable=1
enable_editor=0
enable_shell=1
[ClearWindow_cfgBindings]
clear-window=

打开Python的IDLE,options选项中就可以看到增加了Clear shell window ctrl+;。

在IDLE输入代码,然后按Ctrl+;(是指Ctrl和;),发现刚输入代码可以被清除了。

快捷键Ctrl+;,可修改成其他键,将

clear-window=

里的Control和;修改成其他键即可。

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