参考：http://tieba.baidu.com/p/1988648224
----------------------------------------------------
# -*- coding: utf-8 -*-import re
s = u"中文bab#$%$#%#$"
r = re.sub("[A-Za-z0-9\[\`\~\!\@\#\$\^\&\*\(\)\=\|\{\}\'\:\;\'\,\[\]\.\<\>\/\?\~\！\@\#\\\&\*\%]", "", s)
print（r）# python 3.6.3
-------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------
参考：http://blog.csdn.net/google19890102/article/details/49253117
----------------------------------------------------------------------------------------------
-------------------------------------------------------------------
---------------------------------------------------
-----------------------------------------------------
----------------------------------------------
------------------------------------------------------------
------------------------标点符号去哪里了？？？--------------------------
https://zhidao.baidu.com/question/392819704980056765.html