def exception(self, exception):
        """Prints the stacktrace of the given exception."""
        if self.writelog:
            self.logger.exception(exception)
        if self.verbose:
            for line in  traceback.format_exception(
                    None, exception, exception.__traceback__):
                print(line, end='', file=sys.stderr, flush=True)
Prints the stacktrace of the given exception.