安装openssl-devel依赖，让python支持https
yum install -y openssl-devel
下载并安装python3
wget https://www.python.org/ftp/python/3.6.2/Python-3.6.2.tgz
tar -xzvf Python-3.6.2.tgz
cd Python-3.6.2
./configure --prefix=/usr/local/python3
make&make install
安装脚本用到的python库
/usr/local/python3/bin/pip3 install requests