test.ipynb

test.py

import requests
class Test:
    def _repr_html_(self):
        return "<h1>Test</h1>"

class ChessBoard:
    def _repr_html_(self):
        url = 'https://gist.githubusercontent.com/ontouchstart/d753ff109f591995f399fe5425f0c005/raw/6d2b9e1e016cea1b0d4c1f793b4aa18e7dd53cac/chessboard.svg'
        with requests.get(url) as response:
            html = response.content.decode('utf-8')
        return html

This notebook can be viewed in

https://nbviewer.jupyter.org/gist/ontouchstart/ea1631f69e507a81a9d9ec56b79e4d11

You can also load the code to another notebook on Google Colab and play with it yourself.

https://colab.research.google.com/gist/ontouchstart/934da948842bff86d470ffe25d692e67/test.ipynb