PyScript lets you run Python scripts right in the browser, side by side with JavaScript, with two-way interaction between your code and the web page.

Python isn't the only option for programming machine learning applications: there’s a growing group of developers who use JavaScript to run machine learning models.

On the web front end, web development is one size fits all: JavaScript. The Transcrypt Python to JavaScript compiler aims to execute Python 3.6 at JavaScript speed, with comparable file sizes.

Streamlit lets you write web-based Python data applications without HTML, CSS, or JavaScript. Here's a first look at Streamlit.