一、安装依赖

sudo apt update sudo apt install build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libreadline-dev libffi-dev wget

二、下载安装包

curl -O https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz

三、解压和编译

tar -zxvf Python-3.8.0.tgz

cd Python-3.8.0

./configure --prefix=/usr/local/python3

make && make install

四、设置软连接

ln -sf /usr/local/python3/bin/python3.8 /usr/bin/python3
ln -sf /usr/local/python3/bin/pip3.8 /usr/bin/pip3

最后验证

可能存在的问题:
如果pip3异常,请卸载python2,然后重新编译python3.8