Convenience wrapper for self.log which is passed a list of format arguments.

def _fix_unicode_list(self, columns):
        '''
        Convenience wrapper for self.log which is passed a list of format arguments.
        '''
        if type(columns) in [list, tuple]:
            for i in range(0, len(columns)):
                try:
                    columns[i] = self._fix_unicode(columns[i])
                except AttributeError:
                    pass
        return columns