def check_app_config_brackets(self):
        for sn, app in cherrypy.tree.apps.items():
            if not isinstance(app, cherrypy.Application):
                continue
            if not app.config:
                continue
            for key in app.config.keys():
                if key.startswith("[") or key.endswith("]"):
                    warnings.warn(
                        "The application mounted at %r has config " \
                        "section names with extraneous brackets: %r. "
                        "Config *files* need brackets; config *dicts* "
                        "(e.g. passed to tree.mount) do not." % (sn, key))
Check for Application config with extraneous brackets in section names.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/cherrypy/cherrypy/_cpchecker.py/Checker.check_app_config_brackets