:param target: Full path and filename
        :param dry_run: True - don't actually perform action. False: perform action. No effect for this rule.
        :return: filename: Full path and filename after action completes

def do_action(self, target, dry_run=False):
        """
        :param target: Full path and filename
        :param dry_run: True - don't actually perform action. False: perform action. No effect for this rule.
        :return: filename: Full path and filename after action completes
        """
        original_path = os.path.dirname(target)
        original_filename, original_extension = os.path.splitext(os.path.basename(target))

        new_filename = re.sub(self.match, self.replace_with, original_filename) + original_extension
        destination = os.path.join(original_path, new_filename)

        if dry_run is True:
            self.logger.debug("Dry run: Skipping rename {0} to {1}".format(target, new_filename))
            return target
        else:
            self.logger.debug("Renaming {0} to {1}".format(original_filename + original_extension,
                                                           new_filename + original_extension))

            if not os.path.exists(destination):
                try:
                    shutil.move(target, destination)
                except IOError:
                    self.logger.error("Error renaming file {0} to {1}".format(target, new_filename))
                    raise IOError
            else:
                self.logger.error("Destination file already exists: {0}".format(new_filename))
                raise IOError

        return destination