pip已经安装但是Jupyter Notebook报错No module named 'keras'

(Python3.6) appleyuchi@ubuntu19:~$ which jupyter
/home/appleyuchi/anaconda3/envs/Python3.6/bin/jupyter

import keras
keras.__version__

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-2-98cd3281928c> in <module>
----> 1 import keras
      2 keras.__version__

ModuleNotFoundError: No module named 'keras'

解决方案(这个也是无意中发现的)：

pip install jupyter notebook