启动程序始终指向根环境（Python 2）。如果您已激活Python 3环境，只需键入 ipython notebook 即可启动笔记本（与qtconsole一样， ipython qtconsole ）。

The launcher always points to the root environment (Python 2). If you have activated the Python 3 environment, you can launch the notebook by just typing ipython notebook (and the same with the qtconsole with ipython qtconsole).