feat(pypi): add support for Python 3.12 and 3.13

Add build configuration for Python 3.12 and 3.13 to the PyPI package.
Update the BUILD file with new compatibility tags and config settings,
extend pypi_build.sh to accept the new Python versions, and add build
steps in the GitHub Actions workflow.

Fix whl_test.sh to rename wheels with unstamped variable names before
pip installation. The py_wheel rule creates the base :whl target with
literal stamp variables like _BUILD_EMBED_LABEL_ in the filename for
Bazel caching purposes. Pip 25.x, which ships with Python 3.12+,
strictly validates wheel filenames and rejects these as invalid version
specifiers. Use sed to replace the unstamped variables with a valid
placeholder version (0.0.0) for testing purposes.

Python 3.14 support is not included because Python 3.14 has not yet
been released (scheduled for October 2025).

Fixes: #3186

Author: rkuester

.github/workflows/pypi_build.yml

@@ -38,6 +38,12 @@ jobs:
       - name: Build Wheel 3.11
         run: |
           python/tflite_micro/pypi_build.sh cp311
+      - name: Build Wheel 3.12
+        run: |
+          python/tflite_micro/pypi_build.sh cp312
+      - name: Build Wheel 3.13
+        run: |
+          python/tflite_micro/pypi_build.sh cp313
       - name: Check Directory Output
         run: |
           ls -l bazel-pypi-out

python/tflite_micro/BUILD

@@ -201,6 +201,8 @@ string_flag(
     values = [
         "cp310_cp310_manylinux_2_28_x86_64",
         "cp311_cp311_manylinux_2_28_x86_64",
+        "cp312_cp312_manylinux_2_28_x86_64",
+        "cp313_cp313_manylinux_2_28_x86_64",
         "local",
     ],
 )
@@ -219,6 +221,20 @@ config_setting(
     },
 )
 
+config_setting(
+    name = "cp312_cp312_manylinux_2_28_x86_64",
+    flag_values = {
+        ":compatibility_tag": "cp312_cp312_manylinux_2_28_x86_64",
+    },
+)
+
+config_setting(
+    name = "cp313_cp313_manylinux_2_28_x86_64",
+    flag_values = {
+        ":compatibility_tag": "cp313_cp313_manylinux_2_28_x86_64",
+    },
+)
+
 config_setting(
     name = "local",
     flag_values = {
@@ -235,18 +251,24 @@ py_wheel(
     abi = select({
         ":cp310_cp310_manylinux_2_28_x86_64": "cp310",
         ":cp311_cp311_manylinux_2_28_x86_64": "cp311",
+        ":cp312_cp312_manylinux_2_28_x86_64": "cp312",
+        ":cp313_cp313_manylinux_2_28_x86_64": "cp313",
         ":local": "none",
     }),
     description_file = ":description_file",
     distribution = "tflite_micro",
     platform = select({
         ":cp310_cp310_manylinux_2_28_x86_64": "manylinux_2_28_x86_64",
         ":cp311_cp311_manylinux_2_28_x86_64": "manylinux_2_28_x86_64",
+        ":cp312_cp312_manylinux_2_28_x86_64": "manylinux_2_28_x86_64",
+        ":cp313_cp313_manylinux_2_28_x86_64": "manylinux_2_28_x86_64",
         ":local": "any",
     }),
     python_tag = select({
         ":cp310_cp310_manylinux_2_28_x86_64": "cp310",
         ":cp311_cp311_manylinux_2_28_x86_64": "cp311",
+        ":cp312_cp312_manylinux_2_28_x86_64": "cp312",
+        ":cp313_cp313_manylinux_2_28_x86_64": "cp313",
         ":local": "py3",
     }),
     requires = [

python/tflite_micro/pypi_build.sh

@@ -26,12 +26,14 @@ container. Uses bazel, but does not pollute the WORKSPACE's default cache.
 <python-tag> must be one of the supported interpreters:
    cp310
    cp311
+   cp312
+   cp313
 
 <output-directory> defaults to $OUT_DIR_DEFAULT.
 "
 
 case "$1" in
-    cp310|cp311)
+    cp310|cp311|cp312|cp313)
         PY_TAG=$1
         OUTDIR=$(realpath ${2:-$OUT_DIR_DEFAULT})
         mkdir -p $OUTDIR

python/tflite_micro/whl_test.sh

@@ -21,6 +21,19 @@ set -e
 
 WHL="${1}"
 
+# Rename wheel if it has unstamped variables in the filename. The py_wheel rule
+# creates two outputs: the base :whl target with literal stamp variables in the
+# filename (for Bazel caching), and :whl.dist with expanded variables. This test
+# uses :whl as its data dependency because :whl.dist isn't a proper Bazel target
+# that can be referenced in deps. Pip 25.x in Python 3.12+ strictly validates
+# wheel filenames and rejects literal stamp variables like _BUILD_EMBED_LABEL_.
+# Replace with a valid placeholder version for testing purposes.
+if echo "${WHL}" | grep -q '_BUILD_EMBED_LABEL_'; then
+    RENAMED_WHL=$(echo "${WHL}" | sed 's/_BUILD_EMBED_LABEL_\.dev_STABLE_GIT_COMMIT_TIME_/0.0.0/')
+    cp "${WHL}" "${RENAMED_WHL}"
+    WHL="${RENAMED_WHL}"
+fi
+
 # Create venv for this test.
 python3 -m venv pyenv
 . pyenv/bin/activate