Ubuntu_16.04 安装 Pyhon3.6

Ubuntu 16.04 默认装的是 Python3.5
  
方式一：
  sudo add-apt-repository ppa:jonathonf/python-3.6
  sudo apt-get update
  sudo apt-get install python3.6
  
方式二：  
  wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tar.xz
  tar xf Python-3.6.5.tar.xz
  cd Python-3.6.5
  ./configure --enable-optimizations
  
  sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev \
        libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev \
        libncursesw5-dev xz-utils tk-dev
  
  make && make install
  sudo make altinstall
  
改变链接  
  sudo rm /usr/bin/python3
  ln -s /usr/local/bin/python3.6 /usr/bin/python3
  
试了方式一装不了，方式二可以装，但改了链接后系统有些功能或程序会因为 Python 版本不对用不了