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Publishing WASM wheels to PyPI for use with Pyodide

Simon Willison· ·2 min read · 0 reactions · 0 comments · 60 views
#publishing#wasm#wheels#pypi#pyodide
Publishing WASM wheels to PyPI for use with Pyodide
TL;DR · WeSearch summary

Previously, the Pyodide maintainers had to maintain, build, and host over 300 packages ourselves. This created a significant burden on our maintainers and became a major bottleneck for the community, as every new package required manual review. Moving forward, package maintainers can simply build and publish Pyodide wheels to PyPI, just as they do for native wheels on Linux, macOS, or Windows.

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Simon Willison files mainly under blogs. We currently carry 51 of its stories.

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Simon Willison's Weblog · Simon Willison
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Record

Original publisherSimon Willison's Weblog
Canonical URLhttps://simonwillison.net/2026/Jun/13/publishing-wasm-wheels/#atom-everything
Publication time2026-06-13T23:55:18+00:00
Retrieval time2026-06-14T00:46:43.965Z
Last seen2026-06-14T00:46:43.965Z
Headline sourcePublisher (no WeSearch rewrite)
Excerpt sourcepublisher body
Excerpt methodFirst ~120 words (~800 chars) of extracted publisher body, fair-use limited.
SummaryWeSearch · cerebras-chat (WeSearch summarizer)
Summary source textcontentText
Citation coverageSummary is a WeSearch-generated derivative; primary citation is the original publisher URL.
Cluster8oKS5jkqTK_X
Cluster logicGrouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison.
Ranking reasonStory pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking.
Publisher visitYes — open original
Substitutes article?No — link-out required for full text

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Unknown
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Indexing May the item be indexed (stored, ranked, made findable)? Allowed
Snippet May a short excerpt of the publisher's text be shown? Allowed
AI summary May WeSearch generate its own short summary of the article? Limited
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Commercial reuse May the content be reused commercially? Not permitted

Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.

Opening excerpt (first ~120 words) tap to expand

Publishing WASM wheels to PyPI for use with Pyodide 13th June 2026 The Pyodide 314.0 release announcement (via Hacker News) includes news I’ve been looking forward to for a long time: You can now publish Python packages built for Pyodide (or any Python runtime compatible with the PyEmscripten platform defined in PEP 783) directly to PyPI and install them at runtime. Previously, the Pyodide maintainers had to maintain, build, and host over 300 packages ourselves. This created a significant burden on our maintainers and became a major bottleneck for the community, as every new package required manual review. Moving forward, package maintainers can simply build and publish Pyodide wheels to PyPI, just as they do for native wheels on Linux, macOS, or Windows.

Excerpt limited to ~120 words for fair-use compliance. The full article is at Simon Willison's Weblog.

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