参考： https://blog.csdn.net/qq_25934401/article/details/89849221 https://www.jianshu.com/p/80d233588bd4 确保虚机可以连接外网 --安装python3 yum install libffi-devel  tar xzvf  Python-3.7.4.tgz cd Python-3.7.4 ./