This has been so frustrating, My problem was that within a newly constructed conda python36 environment, jupyter refused to load “seaborn” - even though seaborn was installed within that environment. It seemed to be able to import plenty of other files from the same environment — for example numpy and pandas but just not seaborn. I tried many of the fixes suggested here and on other threads without success. Until I realised that Jupyter was not running kernel python from within that environment but running the system python as kernel. Even though a decent looking kernel and kernel.json were already present in the environment. It was only after reading this part of the ipython documentation: https://ipython.readthedocs.io/en/latest/install/kernel_install.html#kernels-for-different-environments and using these commands:

source activate other-env
python -m ipykernel install --user --name other-env --display-name "Python (other-env)"

我能让一切顺利进行。(我实际上没有使用-user变量)。

我还没有想到的一件事是如何将默认的python设置为“python (other-env)”。目前，从主屏幕打开的现有.ipynb文件将使用系统python。我必须使用内核菜单“更改内核”来选择环境python。

This has been so frustrating, My problem was that within a newly constructed conda python36 environment, jupyter refused to load “seaborn” - even though seaborn was installed within that environment. It seemed to be able to import plenty of other files from the same environment — for example numpy and pandas but just not seaborn. I tried many of the fixes suggested here and on other threads without success. Until I realised that Jupyter was not running kernel python from within that environment but running the system python as kernel. Even though a decent looking kernel and kernel.json were already present in the environment. It was only after reading this part of the ipython documentation: https://ipython.readthedocs.io/en/latest/install/kernel_install.html#kernels-for-different-environments and using these commands:

source activate other-env
python -m ipykernel install --user --name other-env --display-name "Python (other-env)"

我能让一切顺利进行。(我实际上没有使用-user变量)。

我还没有想到的一件事是如何将默认的python设置为“python (other-env)”。目前，从主屏幕打开的现有.ipynb文件将使用系统python。我必须使用内核菜单“更改内核”来选择环境python。

按照iPython文档中的说明，将不同的conda环境添加到Jupyter Notebook中可供选择的内核列表中。总之，安装完ipykernel后，必须在终端中逐个激活conda环境，执行命令python -m ipykernel install——user——name myenv——display-name " python (myenv)"，其中myenv就是要添加的环境(内核)。

对于conda 4.5.12，适用于我的是(我的虚拟环境被称为nwt)

conda create --name nwt python=3

之后，我需要激活虚拟环境并安装ipykernel

activate nwt
pip install ipykernel

那么对我有效的方法是:

python -m ipykernel install --user --name env_name --display-name "name of your choosing."

例如，我使用'nwt'作为虚拟env的显示名称。在运行上面的命令之后。再次在Anaconda Prompt中运行“jupyter notebook”。我得到的是:

我不认为其他答案是工作了，因为conda停止自动设置环境作为jupyter内核。您需要手动为每个环境添加内核，方法如下:

source activate myenv
python -m ipykernel install --user --name myenv --display-name "Python (myenv)"

如下所示:http://ipython.readthedocs.io/en/stable/install/kernel_install.html#kernels-for-different-environments 请参见本期。

附录: 您应该能够使用conda install nb_conda_kernels安装nb_conda_kernels包来自动添加所有环境，请参阅https://github.com/Anaconda-Platform/nb_conda_kernels

    $ conda install nb_conda_kernels

(在运行jupyter notebook的conda环境中)将使所有conda envs自动可用。要访问其他环境，必须安装相应的内核。这是裁判。