python正则表达式不检测方括号(python regex not detecting square brackets)

 我有一个场景，我想从给定的内容中除去空格以外的所有特殊字符，我正在使用Python，并且我正在使用这个正则表达式 
 
re.sub(r"[^a-zA-z0-9 ]+","",content)
 
 Itt是删除所有特殊字符，但没有删除方括号[ ] ，我只是不知道为什么会发生这种情况？ 
 
 之后，我只是使用这个正则表达式 
 
content = re.sub(r"[^a-zA-z0-9 ]+|\[|\]","",content)
 
 它在IDLE IDE完美地工作，并删除所有类型的特殊字符，但是当我想替换像维基百科页面这样的大文件时，它现在不会删除方括号]我只是不知道为什么Python做这种奇怪的行为， 

I have a scenario where I want to remove all special characters except spaces from given content and I am working with Python and I was using this regex
 
re.sub(r"[^a-zA-z0-9 ]+","",content)
 
Itt was removing all special characters but was not removing square brackets [ ] and I just don't know why this happening??
 
after that I just use this regex
 
content = re.sub(r"[^a-zA-z0-9 ]+|\[|\]","",content)
 
It's working flawlessly in IDLE IDE and removing all kind of special characters but when I want to replace large files like Wikipedia's page then its now not removing closing square brackets ] I just dont why Python doing this weird behavior and 

原文：https://stackoverflow.com/questions/31225304