Jupyter Notebook 如何判断您输入的命令是终端命令还是 python 命令？

Question

I just found that without typing "." you can still run some terminal commands in the Jupyter notebook, Such as, "ls", "pwd", "cd". etc, But when I try to run some other terminal command, for example, "tree": it tells me "NameError. name 'tree' is not defined". It means that Jupyter notebook is interpreting that command as a Python command.

Question: how does Jupyter tell if a command is a terminal command or Python command when you don't type "?" before the terminal command?

Answer 1

Jupyter has a set of shell-like commands that it recognizes regardless of whether you add a ! in front of them or not (given that your automagic is set to on, otherwise you have to prefix them with ! ). Some of the most common include cd , cat , cp , man , rm or pwd . The full list is available here .

Unfortunately tree is not one of these commands, so you'd be better off executing that in a dedicated shell.