源码安装 Python 3.8
安装编译所需的依赖：首先安装一些编译 Python 所需的依赖包：
yum groupinstall "Development Tools"
yum install gcc openssl-devel bzip2-devel libffi-devel zlib-devel
下载 Python 3.8 源码：
cd /usr/src
sudo wget https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz解压源码包：
sudo tar xzf Python-3.8.0.tgz
cd Python-3.8.0编译和安装 Python 3.8：
sudo ./configure --enable-optimizations
sudo make altinstall验证安装：
[root@host test]# python3.8 --version
Python 3.8.0
报错解决：
[root@host test]# python3 jiankongtest.py
/usr/local/lib/python3.6/site-packages/paramiko/transport.py:32: CryptographyDeprecationWarning: Python 3.6 is no longer supported by the Python core team. Therefore, support for it is deprecated in cryptography. The next release of cryptography will remove support for Python 3.6.from cryptography.hazmat.backends import default_backend* Serving Flask app 'jiankongtest' (lazy loading)* Environment: productionWARNING: This is a development server. Do not use it in a production deployment.Use a production WSGI server instead.* Debug mode: on* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)* Restarting with stat
/usr/local/lib/python3.6/site-packages/paramiko/transport.py:32: CryptographyDeprecationWarning: Python 3.6 is no longer supported by the Python core team. Therefore, support for it is deprecated in cryptography. The next release of cryptography will remove support for Python 3.6.from cryptography.hazmat.backends import default_backend* Debugger is active!* Debugger PIN: 441-708-060安装 pip：
yum install python38-pip
手动安装：
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3.8 get-pip.py
安装 Flask 和 Paramiko：
python3.8 -m pip install flask paramiko
运行 Flask 项目：
python3.8 jiankongtest.py