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[3.14] gh-124621: Emscripten: Support pyrepl in browser (GH-136931)#136978

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hoodmane wants to merge 1 commit intopython:3.14python/cpython:3.14from
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[3.14] gh-124621: Emscripten: Support pyrepl in browser (GH-136931)#136978
hoodmane wants to merge 1 commit intopython:3.14python/cpython:3.14from
hoodmane:backport-c933a6b-3.14hoodmane/cpython:backport-c933a6b-3.14Copy head branch name to clipboard

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@hoodmane hoodmane commented Jul 22, 2025

Basic support for pyrepl in Emscripten. Limitations:

  • requires JSPI
  • no signal handling implemented

As followup work, it would be nice to implement a webworker variant for when JSPI is not available and proper signal handling.

Because it requires JSPI, it doesn't work in Safari. Firefox requires setting an experimental flag. All the Chromiums have full support since May. Until we make it work without JSPI, let's keep the original web_example around.

Basic support for pyrepl in Emscripten. Limitations:
* requires JSPI
* no signal handling implemented

As followup work, it would be nice to implement a webworker variant
for when JSPI is not available and proper signal handling.

Because it requires JSPI, it doesn't work in Safari. Firefox requires
setting an experimental flag. All the Chromiums have full support since
May. Until we make it work without JSPI, let's keep the original web_example
around.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Éric <merwok@netwok.org>
(cherry picked from commit c933a6b)
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!buildbot Emscripten

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🤖 New build scheduled with the buildbot fleet by @hoodmane for commit 1e83565 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F136978%2Fmerge

The command will test the builders whose names match following regular expression: Emscripten

The builders matched are:

  • WASM Emscripten PR

@ambv ambv changed the title gh-124621: Emscripten: Support pyrepl in browser (GH-136931) [3.14] gh-124621: Emscripten: Support pyrepl in browser (GH-136931) Jul 22, 2025
@bedevere-app bedevere-app bot added the topic-repl Related to the interactive shell label Jul 22, 2025
@ambv ambv closed this Jul 22, 2025
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ambv commented Jul 22, 2025

Closed in favor of #136988.

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