Create an environment (operate at the command prompt)

environment

OS : Windows10 python : 3.8 editor : VSCode 1.40.2

Put the extension python in VS Code. I'm happy if I also include ʻIntelliCode`.

First of all, virtualenv

If you don't have virtualenv, do pip.

Install virtualenv

>pip install virtualenv

Then create a virtual environment.

\Users\usr1

>mkdir virtualenv
>cd virtualenv
>py -m virtualenv jupyter_env

~~~abridgement~~~
done.(Done when this is displayed)

Then start the created environment.

Start-up

>jupyter_env\Script\activate
(jupyter_env)>

If (jupyter_env) is displayed before the prompt >, the startup is complete.

From now on I'll work with VS Code

Start VS Code from the command prompt.

The current position is\User\usr1\virtualenv\

(jupyter_env)>code .

When VSCode starts, display the terminal with Ctrl + Shift + ~.

Upgrade pip

Just in case.

pip upgrade

(jupyter_env)>py -m pip install --upgrade pip

Put jupyter

Let's pip. Other necessary libraries are also included.

(jupyter_env)>pip install jupyter

I need a lot.

Create ipynb with VS Code

Press Ctrl + Shift + p to open the command palette. Once open, type jupyter and you'll see:

Select Python: Create New Blank Jupyter Notebook.

A jupyter-like screen was displayed.

Then select the python interpreter. Press Ctrl + Shift + p to open the command palette. Once open, type select and you'll see: Select Python: Select Interpreter. The name of the environment you created will appear, so select it.

HelloWorld (cannot)

Let's move it immediately. Enter the following in the first cell and press Shift + ʻEnter` to execute.

helloworld

print('Hello world!')

It doesn't work.

Cause of not working

Apparently there is a problem with the library called tornado used by jupyter.

Reference: Jupyter Notebook with Python 3.8 --NotImplementedError

Countermeasures

I was able to fix it by editing ʻasyncio.py of tornado`.

\venv\jupyter_env\Lib\site-packages\tornado\platform\asyncio.py

import asyncio    #Added below this
import sys

if sys.platform == 'win32':
    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

Let's try it again.

Execute with Shift + ʻEnter`. Hooray! You were able to stand at the starting point!

If you did not set it up, the port may have been used.

jupyter uses the 8888 port by default. Run netstat at the command prompt and see if 8888 is being used.

If that doesn't work, you may have failed to build the environment. Please check again.

(If you have any notices such as omission of consideration, please point them out in the comments!)

Let's have a good ** Jupi activity **!

reference

This article is based on articles written by other people.

@ simonritchie's article It seems that the Python extension of VS Code has native support for Jupyter, so I tried using it immediately.

@ matuya's article jupyter notebook in python3.8 venv environment