For one, there is no native mechanism for compiling a Python program into a standalone executable package. To be fair, the original use case for Python never called for standalone redistributables.

Python code is enclosed in the script tag with a type="py" attribute. Note that the code should be formatted according to Python’s conventions for indentation, or it won’t run properly.

Embed Python scripts in HTML with PyScript ; ... However, PyScript acts as a wrapper, allowing you to embed Python code directly between py-script tags and have it automatically executed by Pyodide.