feat(pypi): add support for Python 3.12 and 3.13 (#3211)

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

Co-authored-by: Esun Kim <veblush@google.com>

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