Python 3.6

$ sudo add-apt-repository ppa:jonathonf/python-3.6

$ sudo apt-get update

$ sudo apt-get install python3.6

Python 3.7

$ sudo apt-get install build-essential checkinstall python-dev python-setuptools python-pip python-smbus

$ sudo apt-get install libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev libffi-dev

下载安装

$ cd /usr/src

$ sudo wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz

$ sudo tar xzf Python-3.7.0.tgz

$ cd Python-3.7.0

$ sudo ./configure --enable-optimizations

$ sudo make install

软链接兼容命令

$ sudo ln -s /usr/local/bin/python3 /usr/bin/python3