python怎么清除代码_python的shell中的代码怎么清理？

python shell是Python的命令行。

交互模式下使用Python很方便，如果想清除显示过的信息，有两种方法可以采用。

方法一、针对Python命令行(python shell)

直接使用下面的代码即可清理shell中的代码：>>>import os

>>>n = os.system('cls')

os.system('cls')，调用DOS系统提供的cls命令，成功则返回0。

方法二、针对IDLE Shell

1、在Python X\Lib\idlelib目录下创建ClearWindow.py(其中X是Python版本号)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.textpare('insert', '

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.textpare('insert', '

self.text.mark_set('insert', 'end-1c')

self.editwin.set_line_and_column()

# restore undo delegator

self.editwin.per.insertfilter(undo)

2、在Python X\Lib\idlelib目录下编辑config-extensions.def(IDLE扩展配置文件)