我都试过了，

pip install jupyter

and

pip3 install jupyter

但最后还是用

sudo -H pip install jupyter

以另一个用户-H执行命令

-H (HOME)选项要求安全策略将HOME环境变量设置为密码数据库指定的目标用户(默认为root)的主目录。根据策略的不同，这可能是默认行为。

在Mac Os High Sierra上，我安装了jupyter

python3 -m pip install jupyter    

然后，二进制文件被安装在:

/Library/Frameworks/Python.framework/Versions/3.6/bin/jupyter-notebook

尝试“pip3 install jupyter”，而不是pip。这对我很管用。

我都试过了，

pip install jupyter

and

pip3 install jupyter

但最后还是用

sudo -H pip install jupyter

以另一个用户-H执行命令

-H (HOME)选项要求安全策略将HOME环境变量设置为密码数据库指定的目标用户(默认为root)的主目录。根据策略的不同，这可能是默认行为。

如果jupyter运行此命令:

~/.local/bin/jupyter-notebook

只需在终端中运行此命令

 export PATH=~/.local/bin:$PATH

安装 jupyterlab。

如果你得到这个错误:

ERROR: After October 2020 you may experience errors when installing or updating packages. This is because pip will change the way that it resolves dependency conflicts.

We recommend you use --use-feature=2020-resolver to test your packages with the new resolver before it becomes the default.

requests 2.25.1 requires idna<3,>=2.5, but you'll have idna 3.1 which is incompatible.

用这个:

pip3 install jupyterlab --use-feature=2020-resolver