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

我也遇到了同样的问题，我的新conda环境myenv不能被选为内核或新笔记本。在env中运行jupter notebook也得到了相同的结果。

我的解决方案，以及我了解到Jupyter笔记本如何识别conda-envs和内核:

使用conda将jupyter和ipython安装到myenv:

conda install -n myenv ipython jupyter

在那之后，在任何env之外运行jupter notebook时，将myenv与我以前的环境一起列为内核。

Python [conda env:old]
Python [conda env:myenv]

启动环境后运行笔记本:

source activate myenv
jupyter notebook

隐藏所有其他环境内核，只显示我的语言内核:

python 2
python 3
R

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。

我在使用vscode服务器时遇到了这个问题。 在名为“base”的conda环境中，我安装了1.2.0版本的opennmt-py，但我想在conda环境“opennmt2”中运行jupyter notebook，其中包含使用opennmt-py 2.0的代码。 我通过在conda(opennmt2)中重新安装jupyter解决了这个问题。

conda install jupyter

重新安装后，在opennmt2环境中执行jupyter notebook将执行新安装的jupyter

where jupyter 
/root/miniconda3/envs/opennmt2/bin/jupyter
/root/miniconda3/bin/jupyter

这适用于我在windows 10和最新解决方案:

1)进入conda环境(激活your_env_name)

2) conda install -n your_env_name ipykernel

3) python -m ipykernel install——user——name build_central——display name" your_env_name"

(注意:在步骤3中，“your_env_name”周围包含引号)

我不得不运行前3个答案中提到的所有命令来让它工作:

conda install jupyter
conda install nb_conda
conda install ipykernel
python -m ipykernel install --user --name mykernel