README.md

Docusaurus Live Codeblock for Python

You can create live code editors with a code block live_py meta string.

Install

npm i docusaurus-live-brython # or yarn add docusaurus-live-brython

Modify your docusaurus.config.js

module.exports = {
  ...
+ themes: ['docusaurus-live-brython'],
  presets: ['@docusaurus/preset-classic']
  ...
}

Configure Brython source:

module.exports = {
  ...
+ themes: [
+   ['docusaurus-live-brython'],
+   {
+     brython_src: 'https://cdn.jsdelivr.net/npm/[email protected]/brython.min.js', // default
+     brython_stdlib_src: 'https://cdn.jsdelivr.net/npm/[email protected]/brython_stdlib.js' // default
+   }
  presets: ['@docusaurus/preset-classic']
  ...
}

Example:

import turtle
t = turtle.Turtle()
t.width(5) 
t.speed(5)
for c in ['red', '#00ff00', '#fa0', 'rgb(0,0,200)']:
    t.color(c)
    t.forward(100)
    t.left(90)

# dot() and write() do not require the pen to be down
t.penup()
t.goto(-30, -100)
t.dot(40, 'rgba(255, 0, 0, 0.5')
t.goto(30, -100)
t.dot(40, 'rgba(0, 255, 0, 0.5')
t.goto(0, -70)
t.dot(40, 'rgba(0, 0, 255, 0.5')

t.goto(0, 125)
t.color('purple')
t.write("I love Brython!", font=("Arial", 20, "normal"))

results in an live editable code block:

Options

A brython live code block can have additional options in the meta string:

• title=Some-Text The title shown in the codeblock header. The title must be unique per page. Single hyphens/underscores (- and _) are replaced by a space, double hyphens/underscores are replaced with a single hyphen/undescore: title=Foo-Bar--Bazz => Foo Bar-Bazz; title=Foo_Bar__Bazz => Foo Bar_Bazz
• persistent when added, the reset button will not be shown.
• slim displays only the play button, without a header and without the option to persist changes.

Storage

User edited code is stored in the localStorage. To lookup the edits, id's for each codeblock are generated after the following rules:

• title is present -> use a sanitized version as the key.
• title is not present -> all codeblocks on the page are enumerated and the index number is used as the key. !! Saved Edits are probably not correctly applied.