PyScript has access to every package available through PyPI, with the commonly used Pandas and NumPy already available. However, third-party packages work best if they’re pure Python.

"PyScript is a framework that allows users to create rich Python applications in the browser using a mix of Python with standard HTML." explains Anaconda in a recent blog post.

PyScript wouldn’t be possible without building on top of a recent version of Pyodide—a CPython interpreter compiled with emscripten to WebAssembly, enabling Python to run in the browser.

Key elements of PyScript include how it allows users access to Python in the browser through its enabling of drop-in content, its external file hosting courtesy of the Pyodide project, and its ...

This allows the Python code to be executed directly in a browser-based Excel add-in. PyScript is based on Pyodide, a project originally launched by Mozilla for Python applications in the browser.