Mozilla would like to see the JavaScript data science ecosystem move forward, but bringing a mature Python scientific stack to the browser will be useful in the meantime.

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.

Guido van Rossum, the creator of the hugely popular Python programming language, has given his thoughts on the language for the browser, mobile devices, and upcoming rivals like Julia.

Widely-used Python has now overtaken JavaScript as the programming language developers are most likely to have questions about on knowledge-sharing site Stack Overflow.

It's possible to take a step further with a browser extension, but this is a basic Python project that hosts a web page that you can drag and drop a file on for a visualizer.