yum 删除epel-release并重新安装
1.yum remove epel-release
2.清空epel目录：rm -rf /var/cache/yum/x86_64/6/epel/
3.安装，yum install epel-release
pip install scrapy-redis -i https://pypi.tuna.tsinghua.edu.cn/simple/ #安装python第三方插件：scrapy-redis
原文：https://www.cnblogs.com/Formulate0303/p/13158014.html