I want to remove each of the following special characters from my documents:

symbols = {`,~,!,@,#,$,%,^,&,*,(,),_,-,+,=,{,[,],},|,\,:,;,",<,,,>,.,?,/}

The reason why I am not simply doing something like this:

document = re.sub(r'([^\s\w]|_)+', '', document)

is that in this way I remove also many (accented/special) letters in the case of documents written in languages such as Polish etc.

How can I remove each of the special characters above in one expression?

You can solve this without regular expressions by using str.replace():

symbols = {"`", "~", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "_", "-", "+", "=", "{", "[", "]", "}", "|", "\\", ":", ";", "\"", "<", ",", ">", ".", "?", "/"}for c in symbols:document = document.replace(c, "")