linux下载Python3.8

# 推荐用这个方法
sudo echo 'deb https://launchpad.proxy.ustclug.org/deadsnakes/ppa/ubuntu/ jammy main' >>/etc/apt/sources.list
sudo apt-get update
# 这时会有个报错提示：
# W: GPG error: https://launchpad.proxy.ustclug.org/deadsnakes/ppa/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: # NO_PUBKEY BA6932366A755776
# E: The repository 'https://launchpad.proxy.ustclug.org/deadsnakes/ppa/ubuntu jammy InRelease' is not signed.
# 导入这个key，key的id从报错信息里拿
sudo apt install -y gnupg
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA6932366A755776
sudo apt-get update
sudo apt-get install -y python3.8 libpython3.8-dev python3.8-dev python3.8-distutils
# 安装 pip
wget https://bootstrap.pypa.io/get-pip.py 
python3.8 get-pip.py 
# 加下软链接
sudo ln -s /usr/bin/python3.8 /usr/bin/python3 
sudo ln -s /usr/bin/python3.8 /usr/bin/python 
# 设置下国内镜像源
sudo pip3 config set global.index-url https://mirrors.aliyun.com/pypi/simple