def readConfig(self, config, section, required_fields, optional_fields):
cfg = Settings(config)
if not cfg.load(section, required_fields, optional_fields):
sys.exit(1)
if "log_level" in required_fields:
numeric_level = getattr(logging, cfg.log_level.upper(), None)
if not isinstance(numeric_level, int):
logging.error('Invalid log_level in config: %s' % cfg.log_level)
sys.exit(1)
cfg.log_level = numeric_level
return cfg
