how can i remove punctuation except ! and ? in sentiment analysis in text mining using python

I am working on a text mining project in sentiment analysis. some sentence makes better sense when they have ! and ?. I am using a regular expression technique

text = re.sub("[^a-zA-Z]".format(a), ' ', text)

where text is a list of strings.

with this, all punctuations are removed, but I would like to keep ! and ? and remove the rest.

>Solution :

You can include the ? and ! characters in your regular expression:

text = re.sub("[^a-zA-Z!?]".format(a), ' ', text)