Efficient way to search for invalid characters in python

Question

I am building a forum application in Django and I want to make sure that users dont enter certain characters in their forum posts. I need an efficient way to scan their whol

Answer 1

I can't say what would be more efficient, but you certainly should get rid of the $ (unless it's an invalid character for the message)... right now you only match the re if the characters are at the end of topic_message because $ anchors the match to the right-hand side of the line.