Got this code from here:
        http://stackoverflow.com/questions/6116978/python-replace-multiple-strings

        This method takes a set of strings, A, and removes all whole
        elements of set A from string B.

        Input: text string to strip based on instance attribute self.censor
        Output: a stripped (censored) text string

def str_ripper(self, text):
        """Got this code from here:
        http://stackoverflow.com/questions/6116978/python-replace-multiple-strings

        This method takes a set of strings, A, and removes all whole
        elements of set A from string B.

        Input: text string to strip based on instance attribute self.censor
        Output: a stripped (censored) text string
        """
        return self.pattern.sub(lambda m: self.rep[re.escape(m.group(0))], text)