在启动flask之前，如何检查redis是否正在运行（如果不是，请启动它）？

使用 ping cmd的redis：

import redisfrom redis import ConnectionErrorimport logginglogging.basicConfig()logger = logging.getLogger('redis')rs = redis.Redis("localhost")try:    rs.ping()except ConnectionError:    logger.error("Redis isn't running. try `/etc/init.d/redis-server restart`")    exit(0)

样本输出：

ERROR:redis:Redis isn't running. try `/etc/init.d/redis-server restart`