python shell清屏插件

python实现清屏
今天在使用Python GUI时，被清屏所困扰，查阅网上资源发现一个比较简单的方式。
在python34/Lib/idellib中加入ClearWindow.py。

# IDLEX EXTENSION## """## Copyright(C) 2011-2012 The Board of Trustees of the University of Illinois.## All rights reserved.#### Developed by: Roger D. Serwy## University of Illinois#### Permission is hereby granted, free of charge, to any person obtaining## a copy of this software and associated documentation files (the## "Software"), to deal with the Software without restriction, including## without limitation the rights to use, copy, modify, merge, publish,## distribute, sublicense, and/or sell copies of the Software, and to## permit persons to whom the Software is furnished to do so, subject to## the following conditions:#### + Redistributions of source code must retain the above copyright## notice, this list of conditions and the following disclaimers.## + Redistributions in binary form must reproduce the above copyright## notice, this list of conditions and the following disclaimers in the## documentation and/or other materials provided with the distribution.## + Neither the names of Roger D. Serwy, the University of Illinois, nor## the names of its contributors may be used to endorse or promote## products derived from this Software without specific prior written## permission.#### THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS## OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF## MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.## IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR## ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF## CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH## THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.########## Clear Window Extension#### About:#### It provides "Clear Shell Window" under "Options"## with ability to undo.#### Part of Issue 6143#### """config_extension_def = """[ClearWindow]enable=1enable_editor=0enable_shell=1[ClearWindow_cfgBindings]clear-window=<Control-Key-l>"""jn = lambda x,y: "%i.%i" % (x,y) # join integers to text coordinatessp = lambda x: tuple(map(int, x.split("."))) # convert tkinter Text coordinate to a line and column tupleimport sysimport refrom idlelib.UndoDelegator import DeleteCommandansi_re = re.compile(r"\x01?\x1b[(.*?)m\x02?")def strip_ansi(s): return ansi_re.sub("", s)class ClearWindow: menudefs = [ ("options", [ ("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_window_event(self, ev=None): self.clear_window(ev) return "break" def clear_window(self, event): per = self.editwin.per text = per.bottom iomark_orig = text.index("iomark") line_io, col_io = sp(iomark_orig) # if cursor is at the prompt, preserve the prompt (multiline) prompt = strip_ansi(sys.ps1) backlines = prompt.count("
") prompt_start = jn(line_io-backlines, 0) maybe_prompt = text.get(prompt_start, prompt_start + "+%ic" % len(prompt)) at_prompt = maybe_prompt == prompt if at_prompt: endpos = text.index(prompt_start) else: endpos = text.index("iomark linestart") dump = text.dump("1.0", endpos, all=True) # Add a command to the undo delegator undo = self.editwin.undo if undo: dc = ClearWindowDeleteCommand("1.0", endpos, dump) undo.addcmd(dc) text.edit_reset() # clear out Tkinter"s undo historyclass ClearWindowDeleteCommand(DeleteCommand): def __init__(self, index1, index2, dump): DeleteCommand.__init__(self, index1, index2) self.dump = dump def do(self, text): text.delete(self.index1, self.index2) text.see("insert") def redo(self, text): text.delete(self.index1, self.index2) text.see("insert") def undo(self, text): # inspired by "Serializing a text widget" at http://wiki.tcl.tk/9167 dump = self.dump tag = {} # remember the index where a tag was activated for key, value, index in dump: if key == "text": text.insert(index, value, "") elif key == "tagon": tag[value] = index elif key == "tagoff": text.tag_add(value, tag[value], index) del tag[value] # extend existing tags to the end position for value in tag: text.tag_add(value, tag[value], self.index2) text.see("insert")

然后修改config-extensions.def，在末尾添加

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

这样一来就可以通过快捷键Ctrl+L来进行清屏了。
网上有一款集成了很多插件的GUI叫 IdleX，将其解压之后放在 Python34/Lib/idlex-1.13，通过python idlex.py可以直接运行，有兴趣的同学可以试试。或者大家有更好的方法可以留言一起交流学习。