打开终端修改镜像源：
vi /etc/yum.repos.d/epel.repo
修改如下：
baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch
#metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
安装依赖：
yum -y install gcc zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel vim
下载Python3：
wget https://www.python.org/ftp/python/3.9.2/Python-3.9.2.tgz
安装Python3：
mkdir -p /usr/local/python3
tar -zxvf Python-3.9.2.tgz
cd Python-3.9.2
./configure --prefix=/usr/local/python3
make
make install
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
安装Python Web依赖的类库：
pip3 install xxx
上传文件和启动端口：
上传python文件，并修改Web端口为8889，同时在安全里放行8889端口
启动：
sudo nohup python3 xxx.py >>xxx.log 2>&1 &
现在可以访问了：
{ip}:8889