問題：
I use IPython notebooks and would like to be able to select to create a 2.x or 3.x python notebook in IPython.我使用 IPython 筆記本，並希望能夠選擇在 IPython 中創建 2.x 或 3.x python 筆記本。
I initially had Anaconda.我最初有 Anaconda。 With Anaconda a global environment variable had to be changed to select what version of python you want and then IPython could be started.使用 Anaconda 時，必須更改全局環境變量以選擇所需的 Python 版本，然後才能啓動 IPython。 This is not what I was looking for so I uninstalled Anaconda and now have set up my own installation using MacPorts and PiP.這不是我想要的，所以我卸載了 Anaconda，現在使用 MacPorts 和 PiP 設置了我自己的安裝。 It seems that I still have to use看來還是得用
port select --set python <python version>
to toggle between python 2.x and 3.x.在 python 2.x 和 3.x 之間切換。 which is no better than the anaconda solution.這並不比 anaconda 解決方案好。
Is there a way to select what version of python you want to use after you start an IPython notebook, preferably with my current MacPorts build?有沒有辦法在啓動 IPython 筆記本後選擇要使用的 Python 版本，最好使用我當前的 MacPorts 版本？
解決方案：
參考一： https://en.stackoom.com/question/23wWV參考二： https://stackoom.com/question/23wWV