code: def setup(cls, cron_cfg="cron"):
          
          random.seed()
          logging_cfg = cls.LOGGING_CFG
          if "%s" in logging_cfg:
              logging_cfg = logging_cfg % (cron_cfg if "--cron" in sys.argv[1:] else "scripts",)
          logging_cfg = os.path.expanduser(logging_cfg)
  
          if os.path.exists(logging_cfg):
              logging.HERE = os.path.dirname(logging_cfg)
              logging.config.fileConfig(logging_cfg)
          else:
              logging.basicConfig(level=logging.INFO)
  
          logging.getLogger().debug("Logging config read from '%s'" % logging_cfg)
docs: Set up the runtime environment.