python3.8 创建虚拟环境j
准备：安装3.8
sudo apt-get install python3.8
sudo apt-get install python3.8-venv
python3.8 -m venv env
source env/bin/activate
验证
python --version
准备：安装3.8
sudo apt-get install python3.8
sudo apt-get install python3.8-venv
python3.8 -m venv env
source env/bin/activate
验证
python --version