Switches on logging at a given level.

        :param verbosity_lvl:
        :param format:

def configure_logging(self, verbosity_lvl=None, format='%(message)s'):
        """Switches on logging at a given level.

        :param verbosity_lvl:
        :param format:

        """
        if not verbosity_lvl:
            verbosity_lvl = logging.INFO
        logging.basicConfig(format=format)
        self.logger.setLevel(verbosity_lvl)