I saw a lot of npm packages with the name “pyscript” or “pyscript.js” but I never found the original one.
There are a number of projects named pyscript that are unrelated to “Python in the browser” Pyscript.
The office source for PyScript is:
As a note, that npm package doesn’t actually contain pyodide etc. There has been discussion in GitHub tickets about whether it should. (Good points each way.)