使用 Python 3 打开 Jupyter Notebook

Question

I am running Python2 on a Jupyter Notebook.

When I try to do:

import emcee

I get the error:

File "/home/me/.local/lib/python2.7/site-packages/emcee/ensemble.py", line 84
    parameter_names: Optional[Union[Dict[str, int], List[str]]] = None,
                   ^
SyntaxError: invalid syntax

Is this because I am using Python2 and should be running Python3?

If I do python -V and python3 -V in my terminal, I get Python 2.7.17 and Python 3.6.9 respectively.

So is there an easy way to open a python 3 Jupyter Notebook? I am running Ubuntu 18.04 LTS.

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When I search for answers, I see solutions that involve installing anaconda - but I already have both Jupyter Notebook and Python 3 on my machine. I don't want to mess things up by installing further versions of python and Jupyter Notebook if I don't need to.

Answer 1

Try simply typing in Jupyter notebook directly into your terminal without changing your location within the terminal. It may help to open a fresh terminal session and typing: jupyter notebook.