只要在你的新环境中运行conda install ipykernel，只有这样你才能得到一个带有这个env的内核。即使你在每个envs中安装了不同的版本，它也不会再次安装jupyter笔记本。你可以从任何环境开始你的笔记本，你将能够看到新添加的内核。

如果您的环境没有显示，请确保您已经安装

nb_conda_kernels在Jupyter环境中 你想要访问的Python环境中的ipykernel和ipywidgets(注意，ipywidgets是为了启用一些Juptyer功能，而不是环境可见性，请参阅相关文档)。

Anaconda的文档表明

nb_conda_kernels should be installed in the environment from which you run Jupyter Notebook or JupyterLab. This might be your base conda environment, but it need not be. For instance, if the environment notebook_env contains the notebook package, then you would run conda install -n notebook_env nb_conda_kernels Any other environments you wish to access in your notebooks must have an appropriate kernel package installed. For instance, to access a Python environment, it must have the ipykernel package; e.g. conda install -n python_env ipykernel To utilize an R environment, it must have the r-irkernel package; e.g. conda install -n r_env r-irkernel For other languages, their corresponding kernels must be installed.

除了Python，通过安装适当的*内核包，Jupyter可以访问大量其他语言的内核，包括R、Julia、Scala/Spark、JavaScript、bash、Octave，甚至MATLAB。

请注意，在最初发布这篇文章的时候，可能是nb_conda还不支持Python 3.6环境造成的。

如果其他解决方案无法让Jupyter识别其他conda环境，则始终可以在特定环境中安装和运行Jupyter。不过，你可能无法从木星内部看到或切换到其他环境。

$ conda create -n py36_test -y python=3.6 jupyter
$ source activate py36_test
(py36_test) $ which jupyter
/home/schowell/anaconda3/envs/py36_test/bin/jupyter
(py36_test) $ jupyter notebook

注意，我在这个笔记本中运行的是Python 3.6.1:

注意，如果在许多环境中都这样做，那么在每个环境中安装Jupyter所增加的存储空间可能是不可取的(取决于您的系统)。

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。

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:

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)。

仅使用环境变量:

python -m ipykernel install --user --name $(basename $VIRTUAL_ENV)