ubuntu 16.04 安装 python3.6

1. ubuntu16.04默认安装了python2.7和python3.5, 相关依赖已经安装，若没有则
   sudo apt-get install openssl
sudo apt-get install libssl-dev
sudo apt-get install libc6-dev gcc
sudo apt-get install -y make build-essential zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm tk-dev

2. 导入第三方软件库
   sudo add-apt-repository ppa:jonathonf/python-3.6
   可能会出现 add-apt-repository commod not found
   只需 sudo apt-get install software-properties-common python-software-properties

3. 更新软件源并安装
   sudo apt-get update
sudo apt-get install python3.6

4. 将默认的python 链接指向python3.6
   sudo rm python // (切换到/usr/bin 目录下)需要把原本存在的Python链接删去，重新建立软链接至python 3.6
   sudo ln -s python3.6 /usr/bin/python

安装pip

1. curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
2. python get-pip.py