If you saw “Publishing WASM wheels to PyPI for use with Pyodide” and immediately thought, “Great, now I need to learn the browser build path,” that is often the wrong first move.
For pure Python packages, the blocker is usually simpler: the standard py3-none-any.whl was never uploaded. Pure Python packages are often missing the normal wheel, not a WASM wheel [C002].
That matters because the obvious mistake is expensive. You can burn time on the Pyodide-specific build path before checking whether the ordinary package file even exists on PyPI.
A good update is not the one with the most new terms. A good update is the one that changes your next decision. “Publishing WASM wheels to PyPI for use with Pyodide” sounds like the story [C001]. For many plain Python packages, it is not the first decision.
The practical rule is simple. If the package has no C or Rust code, check PyPI first. If py3-none-any.whl is missing, upload that first. If the package does include compiled code, then the harder Pyodide path starts.
Scope matters here: this is only about pure Python packages installed from PyPI in Pyodide. It does not apply to C, Rust, or other compiled extensions.
If you know someone about to dive into WASM for a plain Python package, send them this first.