This plugin demonstrate the web python mode in ImJoy which allows run python plugin with the browser.

WebPythonDemo.imjoy.html

<docs lang="markdown">
Describe your plugin here.
</docs>

<config lang="json">
{
  "name": "WebPython Demo",
  "mode": "webpython",
  "version": "0.1.0",
  "api_version": "0.1.1",
  "description": "Estimating PI with numpy",
  "tags": [],
  "ui": "Estimating PI with numpy",
  "inputs": null,
  "outputs": null,
  "flags": [],
  "icon": null,
  "env": null,
  "requirements": [],
  "dependencies": []
}
</config>

<script lang="python">
import numpy as np

class ImJoyPlugin():
    def setup(self):
        print('setup in python')

    def run(self, my):
        print('estimating pi using numpy...')
        points = (np.random.rand(1000, 2) * 2.0) - 1.0
        x = points[:, 0]
        y = points[:, 1]
        inside_circle = (x*x + y*y) < 1.0
        pi = (float(np.sum(inside_circle)) / float(len(points))) * 4.0
        api.alert(f'pi={pi}')

api.export(ImJoyPlugin())
</script>