安裝 Python 3.5：
sudo apt-get install python3.5
sudo apt-get install python3.5-dev
sudo apt-get install libncurses5-dev

安裝新版pip：
wget https://bootstrap.pypa.io/get-pip.py
sudo python3 get-pip.py
sudo pip3 install setuptools --upgrade
sudo pip3 install ipython[all]

在 Ubuntu 上安裝 Python 3.5