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Bump 3.13.14 / 3.14.6 / Pyodide 314.0.0; migrate to date-based python-build scheme
`flet-dev/python-build` 20260611 switched from per-minor v-tags (`v3.14` + `python-*-3.14-*.tar.gz`) to date-keyed tags carrying the full patch version (`20260611` + `python-*-3.14.6-*.tar.gz`); one date release now ships every supported minor. Astral PBS advanced to 20260610 (now ships 3.13.14 / 3.14.6); Pyodide 314.0.0 GA'd. Registry (`_pythonReleases` in package_command.dart) updates: * 3.12 row: PBS date 20260610 (CPython 3.12.13 unchanged). * 3.13 row: CPython 3.13.14, PBS date 20260610. * 3.14 row: CPython 3.14.6, PBS date 20260610, Pyodide 314.0.0. * All three rows gain `pythonBuildReleaseDate: "20260611"`. The 3.13 wheel platform tag was also wrong — `pyodide-2025.0-wasm32` where it should have been `pyemscripten-2025.0-wasm32` (the prefix transition happened at Pyodide 0.28/0.29, not at 314.0). Anyone attempting `flet build web --python-version 3.13` against a Pyodide-built native wheel would have failed to match anything. Fixed in the registry. Plugin build scripts (android/build.gradle, darwin/prepare_{ios,macos}.sh, linux + windows CMakeLists.txt) now read two new env vars exported by `flet build`: * SERIOUS_PYTHON_FULL_VERSION (e.g. 3.14.6) — used in the URL filename * SERIOUS_PYTHON_BUILD_DATE (e.g. 20260611) — used as the URL tag Each plugin keeps a baked-in default so standalone (non-`flet build`) consumers keep working without setting the new vars. The per-plugin cache directory key (`$FLET_CACHE_DIR/python-build/v<…>/`) switches from short to full version so a patch bump doesn't reuse a stale tarball. README + 5 changelog entries updated. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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‎src/serious_python/CHANGELOG.md‎

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* **Breaking change:** Android `sysconfig.get_platform()` tag format changed from `android-24-arm64-v8a` to `android-24-arm64_v8a` (and similarly for `armeabi-v7a`). The emitted wheel tag (`android_24_arm64_v8a`) is unchanged, but anything reading the raw `sysconfig.get_platform()` string from `sitecustomize.py` should switch separators.
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* **Breaking change:** Windows host arch identifier dropped the `-shared` suffix (`x86_64-pc-windows-msvc-shared` → `x86_64-pc-windows-msvc`); follows astral-sh/python-build-standalone, which only publishes the combined (already shared) `install_only_stripped` build.
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* Multi-version Python support. The `package` command accepts `--python-version` (or `SERIOUS_PYTHON_VERSION` env var) to select between Python 3.12 / 3.13 / 3.14. The matching CPython-standalone build, Pyodide release, and Emscripten wheel platform tag are looked up from a new `_pythonReleases` table. Adding a future pre-release line (e.g. 3.15 beta) is a one-row append with `prerelease: true`; the Flet CLI uses that flag to keep open-ended `requires-python` specifiers (`>=3.14`) on stable, while still letting `--python-version 3.15` or `==3.15.*` opt in.
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* The Emscripten pip platform tag is now derived per Python release (e.g. `pyodide-2024.0-wasm32` for 0.27.7, `pyemscripten-2026.0-wasm32` for 314.0.0a2), via a `pyodide_platform_tag` field in the version registry. The previous static `pyodide-2024.0-wasm32` entry in `platforms["Emscripten"]` has been removed.
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* The Emscripten pip platform tag is now derived per Python release (e.g. `pyodide-2024.0-wasm32` for 0.27.7, `pyemscripten-2026.0-wasm32` for 314.0.0), via a `pyodide_platform_tag` field in the version registry. The previous static `pyodide-2024.0-wasm32` entry in `platforms["Emscripten"]` has been removed.
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* `sitecustomize.py` now shims `platform.android_ver` so the new pip / packaging that ships with python-build-standalone 20260602+ can compute Android wheel tags on Python 3.12 hosts (where `android_ver` didn't exist) and on Python 3.13+ hosts (where it returns `api_level=0` off-device).
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* Skip 32-bit Android ABIs (`armeabi-v7a`, `x86`) when Python ≥ 3.13 — PEP 738 dropped 32-bit Android support, and `flet-dev/python-build` no longer publishes those runtimes for those versions.
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* Migrate the platform-plugin download URLs to `flet-dev/python-build`'s new date-keyed release scheme (`…/<YYYYMMDD>/python-*-<full-version>-*.tar.gz`) — one release tag now ships every supported Python patch instead of per-minor `v3.X` releases. Plugins (Android `build.gradle`, Darwin `prepare_*.sh`, Linux/Windows `CMakeLists.txt`) read two new env vars set by `flet build`: `SERIOUS_PYTHON_FULL_VERSION` (e.g. `3.14.6`) and `SERIOUS_PYTHON_BUILD_DATE` (e.g. `20260611`); both fall back to baked-in defaults so standalone (non-`flet build`) usage continues to work. Bump bundled versions to **3.12.13 / 3.13.14 / 3.14.6** (Astral PBS `20260610`, python-build `20260611`) and Pyodide for 3.14 to **314.0.0** (GA).
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* **Bug fix:** the Pyodide 0.29 wheel platform tag for the 3.13 row in the version registry was `pyodide-2025.0-wasm32`, but Pyodide actually publishes its wheels under `pyemscripten_2025_0_wasm32` (the `pyodide_` → `pyemscripten_` prefix transition happened at 0.28/0.29, not at 314.0). `flet build web --python-version 3.13` would have failed to match any Pyodide-built native wheel; corrected to `pyemscripten-2025.0-wasm32` in the registry.
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## 1.0.1
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‎src/serious_python/README.md‎

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@@ -22,18 +22,25 @@ the `--python-version X.Y` flag of `serious_python:main package` (or the
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plugin build scripts). Defaults to the latest supported version when nothing
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is specified.
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| Short | CPython runtime | Pyodide (web) | Pyodide wheel platform tag |
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| ----- | --------------- | ------------- | -------------------------- |
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| 3.12 | 3.12.13 | 0.27.7 | `pyodide-2024.0-wasm32` |
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| 3.13 | 3.13.13 | 0.29.4 | `pyodide-2025.0-wasm32` |
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| 3.14 | 3.14.5 | 314.0.0a2 | `pyemscripten-2026.0-wasm32`|
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| Short | CPython runtime | Pyodide (web) | Pyodide wheel platform tag |
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| ----- | --------------- | ------------- | -------------------------------- |
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| 3.12 | 3.12.13 | 0.27.7 | `pyodide-2024.0-wasm32` |
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| 3.13 | 3.13.14 | 0.29.4 | `pyemscripten-2025.0-wasm32` |
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| 3.14 | 3.14.6 | 314.0.0 | `pyemscripten-2026.0-wasm32` |
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The default is the latest stable row (currently **3.14**) when neither
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`--python-version` nor `SERIOUS_PYTHON_VERSION` is set. When running through
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[`flet build`](https://flet.dev/docs/publish/), the same resolution is
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applied to `[project].requires-python` in your `pyproject.toml`, so most
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users never need to touch this flag directly.
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`SERIOUS_PYTHON_VERSION` (short, e.g. `3.14`) is the only input most users
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need to set. When `flet build` invokes the platform plugins it also exports
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`SERIOUS_PYTHON_FULL_VERSION` (e.g. `3.14.6`) and `SERIOUS_PYTHON_BUILD_DATE`
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(e.g. `20260611` — the `flet-dev/python-build` release tag); the plugin build
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scripts pick them up automatically and combine them into the
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`…/<date>/python-*-<full>-*` download URLs.
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Source of truth: the `_pythonReleases` map in
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[`bin/package_command.dart`](bin/package_command.dart) (Dart side) and
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`flet_cli/utils/python_versions.py` (Python side). Adding a new short version

‎src/serious_python/bin/package_command.dart‎

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"SERIOUS_PYTHON_ALLOW_SOURCE_DISTRIBUTIONS";
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const pythonVersionEnvironmentVariable = "SERIOUS_PYTHON_VERSION";
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const pythonFullVersionEnvironmentVariable = "SERIOUS_PYTHON_FULL_VERSION";
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const pythonDistReleaseEnvironmentVariable = "SERIOUS_PYTHON_DIST_RELEASE";
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const pythonBuildDateEnvironmentVariable = "SERIOUS_PYTHON_BUILD_DATE";
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const pyodideVersionEnvironmentVariable = "SERIOUS_PYTHON_PYODIDE_VERSION";
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const defaultPythonVersion = "3.14";
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const _PythonRelease({
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required this.standaloneVersion,
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required this.standaloneReleaseDate,
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required this.pythonBuildReleaseDate,
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required this.pyodideVersion,
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required this.pyodidePlatformTag,
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required this.prerelease,
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});
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final String standaloneVersion;
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final String standaloneReleaseDate;
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// Release date tag of the matching `flet-dev/python-build` release
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// (e.g. "20260611"). Combined with `standaloneVersion` to construct the
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// platform-plugin download URLs.
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final String pythonBuildReleaseDate;
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final String pyodideVersion;
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final String pyodidePlatformTag;
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@@ -55,22 +64,25 @@ class _PythonRelease {
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const _pythonReleases = <String, _PythonRelease>{
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"3.12": _PythonRelease(
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standaloneVersion: "3.12.13",
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standaloneReleaseDate: "20260602",
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standaloneReleaseDate: "20260610",
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pythonBuildReleaseDate: "20260611",
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pyodideVersion: "0.27.7",
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pyodidePlatformTag: "pyodide-2024.0-wasm32",
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prerelease: false,
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),
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"3.13": _PythonRelease(
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standaloneVersion: "3.13.13",
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standaloneReleaseDate: "20260602",
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standaloneVersion: "3.13.14",
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standaloneReleaseDate: "20260610",
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pythonBuildReleaseDate: "20260611",
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pyodideVersion: "0.29.4",
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pyodidePlatformTag: "pyodide-2025.0-wasm32",
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pyodidePlatformTag: "pyemscripten-2025.0-wasm32",
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prerelease: false,
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),
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"3.14": _PythonRelease(
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standaloneVersion: "3.14.5",
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standaloneReleaseDate: "20260602",
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pyodideVersion: "314.0.0a2",
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standaloneVersion: "3.14.6",
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standaloneReleaseDate: "20260610",
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pythonBuildReleaseDate: "20260611",
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pyodideVersion: "314.0.0",
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pyodidePlatformTag: "pyemscripten-2026.0-wasm32",
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prerelease: false,
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),
@@ -82,6 +94,7 @@ const _pythonReleases = <String, _PythonRelease>{
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// "3.15": _PythonRelease(
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// standaloneVersion: "3.15.0",
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// standaloneReleaseDate: "...",
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// pythonBuildReleaseDate: "...",
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// pyodideVersion: "...",
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// pyodidePlatformTag: "...",
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// prerelease: true,
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exit(2);
275288
}
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_release = _PythonRelease(
277-
standaloneVersion: baseRelease.standaloneVersion,
290+
standaloneVersion:
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Platform.environment[pythonFullVersionEnvironmentVariable] ??
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baseRelease.standaloneVersion,
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standaloneReleaseDate:
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Platform.environment[pythonDistReleaseEnvironmentVariable] ??
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baseRelease.standaloneReleaseDate,
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pythonBuildReleaseDate:
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Platform.environment[pythonBuildDateEnvironmentVariable] ??
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baseRelease.pythonBuildReleaseDate,
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pyodideVersion:
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Platform.environment[pyodideVersionEnvironmentVariable] ??
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baseRelease.pyodideVersion,

‎src/serious_python_android/CHANGELOG.md‎

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* Multi-version Python support. `python_version` in `android/build.gradle` reads from `SERIOUS_PYTHON_VERSION` and drives the `flet-dev/python-build` download URL.
55
* The Dart runtime no longer hardcodes `libpython3.12.so` — it scans `nativeLibraryDir` for `libpython3.*.so` so whichever libpython the plugin bundled is loaded automatically.
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* `abiFilters` now branches on `python_version`: keep `armeabi-v7a` for 3.12, restrict to `arm64-v8a` + `x86_64` for 3.13+ (python-build dropped 32-bit Android per PEP 738).
7+
* Migrate `downloadDistArchive_*` to `flet-dev/python-build`'s new date-keyed release scheme (`…/<YYYYMMDD>/python-android-dart-<full-version>-<abi>.tar.gz` instead of `…/v<short>/python-android-dart-<short>-<abi>.tar.gz`). Two new env vars — `SERIOUS_PYTHON_FULL_VERSION` (e.g. `3.14.6`) and `SERIOUS_PYTHON_BUILD_DATE` (e.g. `20260611`) — are read alongside `SERIOUS_PYTHON_VERSION`, both with baked-in defaults so standalone (non-`flet build`) usage continues to work. The cache directory key (`$FLET_CACHE_DIR/python-build/v<…>/`) switches from short to full version so patch bumps don't reuse a stale tarball.
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## 1.0.1
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‎src/serious_python_android/android/build.gradle‎

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version '2.0.0'
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def python_version = System.getenv('SERIOUS_PYTHON_VERSION') ?: '3.14'
5+
def python_full_version = System.getenv('SERIOUS_PYTHON_FULL_VERSION') ?: '3.14.6'
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def python_build_date = System.getenv('SERIOUS_PYTHON_BUILD_DATE') ?: '20260611'
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def dart_bridge_version = System.getenv('DART_BRIDGE_VERSION') ?: '1.2.1'
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buildscript {
@@ -70,7 +72,7 @@ import de.undercouch.gradle.tasks.download.Download
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def fletCacheRoot = System.getenv('FLET_CACHE_DIR')
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def pythonCacheDir = new File(
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fletCacheRoot ? new File(fletCacheRoot) : new File(System.getProperty('user.home'), '.flet/cache'),
73-
"python-build/v${python_version}"
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"python-build/v${python_full_version}"
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)
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def dartBridgeCacheDir = new File(
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fletCacheRoot ? new File(fletCacheRoot) : new File(System.getProperty('user.home'), '.flet/cache'),
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tasks.register("downloadDistArchive_$abi", Download) {
105-
src "https://github.com/flet-dev/python-build/releases/download/v${python_version}/python-android-dart-${python_version}-${abi}.tar.gz"
106-
dest new File(pythonCacheDir, "python-android-dart-${python_version}-${abi}.tar.gz")
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src "https://github.com/flet-dev/python-build/releases/download/${python_build_date}/python-android-dart-${python_full_version}-${abi}.tar.gz"
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dest new File(pythonCacheDir, "python-android-dart-${python_full_version}-${abi}.tar.gz")
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onlyIfModified true
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useETag "all"
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tempAndMove true

‎src/serious_python_darwin/CHANGELOG.md‎

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* **Breaking change:** default bundled Python version is now 3.14 (was 3.12). Apps built without an explicit `SERIOUS_PYTHON_VERSION` env var pull `python-ios-dart-3.14.tar.gz` / `python-macos-dart-3.14.tar.gz` from `flet-dev/python-build`. Set `SERIOUS_PYTHON_VERSION=3.12` to preserve the previous default.
44
* Multi-version Python support. `python_version` in `serious_python_darwin.podspec` reads from `SERIOUS_PYTHON_VERSION`; `prepare_ios.sh` / `prepare_macos.sh` already took the version as `$1` and download the matching tarballs.
5+
* Migrate `prepare_ios.sh` / `prepare_macos.sh` to `flet-dev/python-build`'s new date-keyed release scheme (`…/<YYYYMMDD>/python-{ios,macos}-dart-<full-version>.tar.gz`). The podspec now reads `SERIOUS_PYTHON_FULL_VERSION` and `SERIOUS_PYTHON_BUILD_DATE` (defaults baked in) and passes them as positional args `$2` / `$3` to the prepare scripts.
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## 1.0.1
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‎src/serious_python_darwin/darwin/prepare_ios.sh‎

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python_version=${1:?}
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python_full_version=${2:?}
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python_build_date=${3:?}
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script_dir=$(cd "$(dirname "$0")" && pwd -P)
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dist=$script_dir/dist_ios
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# Cross-plugin download cache; see prepare_macos.sh for the convention.
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cache_root="${FLET_CACHE_DIR:-$HOME/.flet/cache}"
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pb_cache="$cache_root/python-build/v$python_version"
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pb_cache="$cache_root/python-build/v$python_full_version"
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db_cache="$cache_root/dart-bridge/v$dart_bridge_version"
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mkdir -p "$pb_cache" "$db_cache"
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# ---- flet-dev/python-build (iOS embedded Python runtime) ------------------
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python_ios_dist_file="python-ios-dart-$python_version.tar.gz"
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python_ios_dist_file="python-ios-dart-$python_full_version.tar.gz"
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python_ios_dist_path="$pb_cache/$python_ios_dist_file"
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if [ ! -f "$python_ios_dist_path" ]; then
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python_ios_dist_url="https://github.com/flet-dev/python-build/releases/download/v$python_version/$python_ios_dist_file"
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python_ios_dist_url="https://github.com/flet-dev/python-build/releases/download/$python_build_date/$python_ios_dist_file"
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curl -fL -o "$python_ios_dist_path.tmp" "$python_ios_dist_url"
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‎src/serious_python_darwin/darwin/prepare_macos.sh‎

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python_version=${1:?}
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python_full_version=${2:?}
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python_build_date=${3:?}
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script_dir=$(cd "$(dirname "$0")" && pwd -P)
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# gradle task + flet build's external tooling already use; ~/.flet/cache is
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# the shared default. Tarballs land here and survive `flutter clean`.
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cache_root="${FLET_CACHE_DIR:-$HOME/.flet/cache}"
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pb_cache="$cache_root/python-build/v$python_version"
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pb_cache="$cache_root/python-build/v$python_full_version"
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db_cache="$cache_root/dart-bridge/v$dart_bridge_version"
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mkdir -p "$pb_cache" "$db_cache"
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# ---- flet-dev/python-build (macOS embedded Python runtime) ----------------
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python_macos_dist_file="python-macos-dart-$python_version.tar.gz"
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python_macos_dist_file="python-macos-dart-$python_full_version.tar.gz"
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python_macos_dist_path="$pb_cache/$python_macos_dist_file"
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if [ ! -f "$python_macos_dist_path" ]; then
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python_macos_dist_url="https://github.com/flet-dev/python-build/releases/download/v$python_version/$python_macos_dist_file"
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python_macos_dist_url="https://github.com/flet-dev/python-build/releases/download/$python_build_date/$python_macos_dist_file"
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# .tmp + mv so a Ctrl-C / network blip doesn't poison the cache.
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‎src/serious_python_darwin/darwin/serious_python_darwin.podspec‎

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s.swift_version = '5.0'
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python_version = ENV['SERIOUS_PYTHON_VERSION'] || "3.14"
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python_full_version = ENV['SERIOUS_PYTHON_FULL_VERSION'] || "3.14.6"
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python_build_date = ENV['SERIOUS_PYTHON_BUILD_DATE'] || "20260611"
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dist_ios = "dist_ios"
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dist_macos = "dist_macos"
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prepare_command = <<-CMD
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./symlink_pod.sh
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./prepare_ios.sh #{python_version}
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./prepare_ios.sh #{python_version} #{python_full_version} #{python_build_date}
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./prepare_macos.sh #{python_version} #{python_full_version} #{python_build_date}
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./sync_site_packages.sh
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CMD
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‎src/serious_python_linux/CHANGELOG.md‎

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* **Breaking change:** default bundled Python version is now 3.14 (was 3.12). The plugin downloads `python-linux-dart-3.14-<arch>.tar.gz` from `flet-dev/python-build` and bundles `libpython3.14.so.1.0` unless `SERIOUS_PYTHON_VERSION=3.12` is set in the build environment.
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* Multi-version Python support. `PYTHON_VERSION` in `linux/CMakeLists.txt` reads from `SERIOUS_PYTHON_VERSION`, and all `python3.12` / `libpython3.12.so.1.0` / `lib/python3.12` paths are derived from it. The plugin source receives the version via a `SERIOUS_PYTHON_VERSION` compile-time macro so the runtime module path matches the bundled distro.
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* Migrate the `python-linux-dart` download URL to `flet-dev/python-build`'s new date-keyed release scheme (`…/<YYYYMMDD>/python-linux-dart-<full-version>-<arch>.tar.gz`). `CMakeLists.txt` now reads `SERIOUS_PYTHON_FULL_VERSION` and `SERIOUS_PYTHON_BUILD_DATE` from the environment (with baked-in defaults) and the cache directory key uses the full version so patch bumps don't reuse a stale tarball.
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## 1.0.1
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