Jupyter Notebook in virtualenv

$ source ~/envs/tensorflow-2.0/bin/activate

(tensorflow-2.0) $ pip3 install ipykernel

(tensorflow-2.0) $ ipython kernel install --user --name=tensorflow-2.0

(tensorflow-2.0) $ jupyter notebook

進入網頁

1. 在 New 一個 Notebook 時選擇 tensorflow-2.0

2. 開啟 ipynb 改變 virtualenv, 由 menu/Kernel/Change kernel/tensorflow-2.0