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PEP 818: Add "Emscripten-forge supports this pep" to motivation #5159

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StanFromIreland merged 2 commits into from
Oct 2, 2026
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PEP 818: Add "Emscripten-forge supports this pep" to motivation #5159

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PEP 818: Add "Emscripten-forge supports this pep" to motivation
hoodmane Oct 2, 2026
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Fix typo
hoodmane Oct 2, 2026
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11 changes: 11 additions & 0 deletions peps/pep-0818.rst
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Expand Up @@ -64,6 +64,17 @@ interface, it will be possible to support ``urllib`` on Emscripten. Downstream,
supporting ``urllib3``, ``aiohttp``, and ``httpx`` requires the foreign function
interface.

The fact that the Pyodide foreign function interface is coupled to Pyodide
creates problems for other Emscripten-CPython distributions. For instance,
`Emscripten-forge`_ is a project that provides conda recipes for the Emscripten
platform. They have to reimplement the Pyodide foreign function interface in
order to support downstream packages that use it. Their reimplementation is
slower and has various minor incompatibilities. For this reason, the
Emscripten-force maintainers strongly support adding Pyodide's interface to
CPython.

.. _Emscripten-forge: https://emscripten-forge.org/

In order to keep the length of this PEP reasonable, we focus on the "core" of
the foreign function interface. The JavaScript interface for managing the Python
runtime is left to a future PEP.
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