对我来说，在激活虚拟环境之前，它不起作用。

Try

Python -m notebook

或者，如果您使用pip3安装笔记本:

Python3 -m笔记本

在Mac OS Catalina和Python3.7上

对我来说，在激活虚拟环境之前，它不起作用。

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

在MacOs上，这对我来说很管用:

/Users/`userName`/opt/anaconda3/bin/jupyter_mac.command

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