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有必要这么复杂吗
试试
import os
os.system('cls')
只会多一个0
---------------------------
忘了说了,这个只有cmd管用,IDLE 好像不行。
为啥要用自带的idle?集成到vs和用命令行多方便。 原文链接:python idle 清屏问题的解决

在学习和使用python的过程中,少不了要与Python IDLE打交道。但使用 Python IDLE 都会遇到一个常见而又懊恼的问题——要怎么清屏?
答案是为IDLE增加一个清屏的扩展ClearWindow就可以了(在Issue 6143: IDLE中可以看到这个扩展的说明)。
下面我说说安装使用的方法。
1、下载clearwindow.py(右击-目标另存为,格式为py结尾,直接点击会打开脚本内容)。
2、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)。
3、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 。
4、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=
5、打开Python的IDLE,options选项中就可以看到增加了Clear shell window ctrl+;。
6、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。

说明:
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。
经试验,Control换成Alter时,会启动不了IDLE,换成Shift时,快捷键不起作用,因为Shift+l,直接变成输入L了。 可以参考 python idle 清屏问题的解决 关掉重开 我也非常讨厌idle这一点,要是能像matlab那样clear,clc一句话搞定就好了,可惜我们得再去安装插件

要是不安装插件,我觉得只好这样了
IDLE如何清屏? IDLE如何清屏? 前面几个说没成功 的,要将文件名字,ClearWindow 首字母大写 ,这样就能成功了。 好麻烦,还是关了重开吧。要是有clear命令就好了 2016年的新式办法,python 3.5.1 + Windows
pip install idlex

然后创建一个快捷方式
C:\Python3\pythonw.exe "c:\Python3\scripts\idlex.pyw"

路径按自己的实际情况替换下,就OK了

缺点:用方向键上下对已经输入的命令进行遍历时,如果有多行的输入历史,会卡在那里 为什么我的就不行呢,按照步骤做的啊?在options下面只有一个Python Configure option 谢谢, 安装完成!
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