小叹python日记(二)清屏命令
小叹今天刚刚开始学习python,遇到了IDLE上面不会清屏的问题,之前学习liunx时有Ctrl+L清屏,现在我们也来实现Ctrl+L
首先,我们要准备一个名为“ClearWindow.py”的文件
其代码如下:
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)
可以将此代码拷贝到ClearWindow.py中保存,然后把ClearWindow.py拷贝到python的安装目录下的Lib/idlelib中,如图:
在此目录下找到“config-extensions.def”文件,右键选择“编辑”
添加以下内容到末尾:
[ClearWindow]
enable=1
enable_editor=0
enable_shell=1
[ClearWindow_cfgBindings]
clear-window=<Control-Key-l>
之后打开IDLE后就可以Ctrl+L进行清屏