code: def _defaults():
      
      d = {}
      d['url'] = os.environ.get('BUGZSCOUT_URL')
      d['user'] = os.environ.get('BUGZSCOUT_USER')
      d['project'] = os.environ.get('BUGZSCOUT_PROJECT')
      d['area'] = os.environ.get('BUGZSCOUT_AREA')
      return d
docs: Returns a dict of default args from the environment, which can be
      overridden by command line args.