[Backport][v1.75.x][Python][Support 3.14] Enable 3.14 supported wheels (#40726)

sreenithi · web-flow · commit 74ec067e2839 · 2025-09-18T22:21:13.000+05:30
Backport of #40403 to v1.75.x. --- This PR enables Python 3.14 in all the different tests - Basic tests (Native Python tests), Bazel tests and Distrib tests to build Python 3.14 artifacts. In addition, it also updates all the public facing METADATA versions. ## Distribtests Required pre-requisite changes to enable 3.14 artifacts are covered in #40289 . ## Bazel tests Enabling Python 3.14 required updating the rules_python version to a more recent version that supports 3.14. This was done in #40602 ## Basic tests The following errors were caught by the Basic tests when running via Python 3.14 and resolved in this PR: ### 1) No running event loop for AsyncIO when run outside an async function ``` Traceback (most recent call last): File "src/python/grpcio/grpc/_cython/_cygrpc/aio/common.pyx.pxi", line 184, in grpc._cython.cygrpc.get_working_loop RuntimeError: no running event loop ``` This was caught by the `tests_aio.unit.outside_init_test.TestOutsideInit` and `tests_aio.unit.init_test.TestInit` tests, and was also previously reported in #39507 with the root cause. Following some investigation, the fix is being worked on by @sergiitk in PR #40293. In order to parallelize the fix and this PR, these 2 tests are currently being skipped for Python 3.14 and above. ### 2) Pickling error from the `multiprocessing` library ``` _pickle.PicklingError: Can't pickle <function _test_well_known_types at 0x7f3937eee610>: it's not the same object as tests.unit._dynamic_stubs_test._test_well_known_types when serializing dict item '_target' when serializing multiprocessing.context.Process state when serializing multiprocessing.context.Process object ``` This was caught by the `tests.unit._dynamic_stubs_test.DynamicStubTest` which runs test cases in a subprocess using the `multiprocessing` library. Error root cause: - The default start method of multiprocessing in linux has changed to `forkserver` instead of `fork` from Python 3.14. - `forkserver` has a few extra restrictions for picklability as compared to `fork` (Ref: [Python Docs](https://docs.python.org/3.14/library/multiprocessing.html#the-spawn-and-forkserver-start-methods)) - All the [test case functions](https://github.com/grpc/grpc/blob/0243842d5d10f624bf8f09f45026dd300805502f/src/python/grpcio_tests/tests/unit/_dynamic_stubs_test.py#L115) in the DynamicStubTest that are provided as `target` to the `multiprocessing.Process` use decorators. This causes problems when pickling them. Hence to resolve this, we manually set the 'start method' of `multiprocessing` to use the `fork` start method.
diff --git a/MODULE.bazel b/MODULE.bazel
@@ -68,6 +68,7 @@ PYTHON_VERSIONS = [
     "3.11",
     "3.12",
     "3.13",
+    "3.14.0b2",
 ]
 
 python = use_extension("@rules_python//python/extensions:python.bzl", "python")
diff --git a/build_handwritten.yaml b/build_handwritten.yaml
@@ -22,6 +22,7 @@ settings:
   - '3.11'
   - '3.12'
   - '3.13'
+  - '3.14'
   version: 1.75.0
 configs:
   asan:
diff --git a/src/python/grpcio/python_version.py b/src/python/grpcio/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_admin/python_version.py b/src/python/grpcio_admin/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_admin/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_channelz/python_version.py b/src/python/grpcio_channelz/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_channelz/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_csds/python_version.py b/src/python/grpcio_csds/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_csds/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_csm_observability/python_version.py b/src/python/grpcio_csm_observability/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_csm_observability/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_health_checking/python_version.py b/src/python/grpcio_health_checking/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_health_checking/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_observability/python_version.py b/src/python/grpcio_observability/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_observability/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_reflection/python_version.py b/src/python/grpcio_reflection/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_reflection/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_status/python_version.py b/src/python/grpcio_status/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio_status/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/src/python/grpcio_tests/tests/unit/_dynamic_stubs_test.py b/src/python/grpcio_tests/tests/unit/_dynamic_stubs_test.py
@@ -68,6 +68,13 @@ def _wrapped():
 
 
 def _run_in_subprocess(test_case):
+    # The default start method of multiprocessing in linux has changed to
+    # `forkserver` instead of `fork` from Python 3.14. This causes problems
+    # with pickling target methods that use decorators.
+    # Hence manually set to use the `fork` start method.
+    if sys.version_info >= (3, 14) and ("linux" in sys.platform):
+        multiprocessing.set_start_method("fork", force=True)
+
     sys.path.insert(
         0, os.path.join(os.path.realpath(os.path.dirname(__file__)), "..")
     )
diff --git a/src/python/grpcio_tests/tests_aio/unit/init_test.py b/src/python/grpcio_tests/tests_aio/unit/init_test.py
@@ -12,9 +12,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+import sys
 import unittest
 
 
+@unittest.skipIf(
+    sys.version_info >= (3, 14),
+    "Skip for Python 3.14+ until https://github.com/grpc/grpc/pull/40293 is merged",
+)
 class TestInit(unittest.TestCase):
     def test_grpc(self):
         import grpc  # pylint: disable=wrong-import-position
diff --git a/src/python/grpcio_tests/tests_aio/unit/outside_init_test.py b/src/python/grpcio_tests/tests_aio/unit/outside_init_test.py
@@ -15,6 +15,7 @@
 
 import asyncio
 import logging
+import sys
 import unittest
 
 import grpc
@@ -27,6 +28,10 @@
 _NUM_OF_LOOPS = 50
 
 
+@unittest.skipIf(
+    sys.version_info >= (3, 14),
+    "Skip for Python 3.14+ until https://github.com/grpc/grpc/pull/40293 is merged",
+)
 class TestOutsideInit(unittest.TestCase):
     def test_behavior_outside_asyncio(self):
         # Ensures non-AsyncIO object can be initiated
diff --git a/templates/MODULE.bazel.inja b/templates/MODULE.bazel.inja
@@ -68,6 +68,7 @@ PYTHON_VERSIONS = [
     "3.11",
     "3.12",
     "3.13",
+    "3.14.0b2",
 ]
 
 python = use_extension("@rules_python//python/extensions:python.bzl", "python")
diff --git a/tools/bazelify_tests/dockerimage_current_versions.bzl b/tools/bazelify_tests/dockerimage_current_versions.bzl
@@ -37,7 +37,7 @@ DOCKERIMAGE_CURRENT_VERSIONS = {
     "tools/dockerfile/distribtest/csharp_dotnet5_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/csharp_dotnet5_x64@sha256:9234c28596f48f82628ca58437a20c63148cd818a10bd15f7b85490bb432d923",
     "tools/dockerfile/distribtest/csharp_ubuntu2204_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/csharp_ubuntu2204_x64@sha256:2ce824e9dcd7b3eb6a6bf004298d33c9720fd362939b08cb7cdd6808d7ecf807",
     "tools/dockerfile/distribtest/php8_debian12_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/php8_debian12_x64@sha256:f81b0702bd28823f12402cfabc8eaecebd0fd2b58a28ba93ef40f9832b25196f",
-    "tools/dockerfile/distribtest/python_alpine_aarch64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_alpine_aarch64@sha256:4178c853e872927b37627e0201e72adfcae47edcb5f80d441bbfaf55db4f92e9",
+    "tools/dockerfile/distribtest/python_alpine_aarch64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_alpine_aarch64@sha256:ad38e1307cef00d8e99b65274f98af3645203caf6ab34226505509d85ac48819",
     "tools/dockerfile/distribtest/python_alpine_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_alpine_x64@sha256:7b5ec7e008baa5d3f83daeca7fee53fee8f5f03d77df8c58104626eb4c2a239b",
     "tools/dockerfile/distribtest/python_arch_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_arch_x64@sha256:cc4c9bafe3bfee407bb1bec22d8c62c1a29db718a3926b9073128d311067f7bb",
     "tools/dockerfile/distribtest/python_bullseye_x64.current_version": "docker://us-docker.pkg.dev/grpc-testing/testing-images-public/python_bullseye_x64@sha256:9d4281e3c006dc9092417aef8916e5e5a2e4893df21ab7482fb6902025b96eb8",
diff --git a/tools/bazelify_tests/test/BUILD b/tools/bazelify_tests/test/BUILD
@@ -277,8 +277,8 @@ grpc_build_artifact_task(
 # Python artifact build tasks
 
 grpc_build_artifact_task(
-    name = "artifact_python_linux_x64_manylinux2014_cp313",
-    build_script = "build_artifact_python_linux_x64_cp313.sh",
+    name = "artifact_python_linux_x64_manylinux2014_cp314",
+    build_script = "build_artifact_python_linux_x64_cp314.sh",
     docker_image_version = "tools/dockerfile/grpc_artifact_python_manylinux2014_x64.current_version",
 )
 
@@ -295,7 +295,7 @@ grpc_build_artifact_task(
     name = "package_python_linux",
     # TODO(jtattermusch): add more python artifacts once they are migrated from artifact_targets.py
     artifact_deps = [
-        "artifact_python_linux_x64_manylinux2014_cp313",
+        "artifact_python_linux_x64_manylinux2014_cp314",
         "artifact_python_linux_x64_manylinux2014_cp39",
     ],
     build_script = "build_package_python_linux.sh",
@@ -429,7 +429,7 @@ test_suite(
         ":artifact_protoc_linux_aarch64_build_test",
         ":artifact_protoc_linux_x64_build_test",
         ":artifact_protoc_linux_x86_build_test",
-        ":artifact_python_linux_x64_manylinux2014_cp313_build_test",
+        ":artifact_python_linux_x64_manylinux2014_cp314_build_test",
         ":artifact_python_linux_x64_manylinux2014_cp39_build_test",
         ":package_csharp_linux_build_test",
         ":package_python_linux_build_test",
diff --git a/tools/bazelify_tests/test/build_artifact_python_linux_x64_cp314.sh b/tools/bazelify_tests/test/build_artifact_python_linux_x64_cp314.sh
@@ -17,8 +17,8 @@ set -ex
 
 # env variable values extracted from PythonArtifact in tools/run_tests/artifacts/artifact_targets.py
 # TODO(jtattermusch): find a better way of configuring the python artifact build (the current approach mostly serves as a demonstration)
-export PYTHON=/opt/python/cp313-cp313/bin/python
-export PIP=/opt/python/cp313-cp313/bin/pip
+export PYTHON=/opt/python/cp314-cp314/bin/python
+export PIP=/opt/python/cp314-cp314/bin/pip
 export GRPC_SKIP_PIP_CYTHON_UPGRADE=TRUE
 export GRPC_RUN_AUDITWHEEL_REPAIR=TRUE
 export GRPC_BUILD_GRPCIO_TOOLS_DEPENDENTS=TRUE
diff --git a/tools/distrib/python/grpcio_tools/grpc_tools/python_version.py b/tools/distrib/python/grpcio_tools/grpc_tools/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/grpc_tools/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/tools/distrib/python/grpcio_tools/python_version.py b/tools/distrib/python/grpcio_tools/python_version.py
@@ -14,7 +14,7 @@
 
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/tools/distrib/python/grpcio_tools/python_version.py.template`!!!
 
-SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13"]
+SUPPORTED_PYTHON_VERSIONS = ["3.9","3.10","3.11","3.12","3.13","3.14"]
 
 MIN_PYTHON_VERSION = 3.9
-MAX_PYTHON_VERSION = 3.13
+MAX_PYTHON_VERSION = 3.14
diff --git a/tools/distrib/python/xds_protos/python_version.py b/tools/distrib/python/xds_protos/python_version.py
diff --git a/tools/dockerfile/distribtest/python_alpine_aarch64.current_version b/tools/dockerfile/distribtest/python_alpine_aarch64.current_version
@@ -1 +1 @@
-us-docker.pkg.dev/grpc-testing/testing-images-public/python_alpine_aarch64:e78a4b229d02acb518073cddbeb1d359dce6e789@sha256:4178c853e872927b37627e0201e72adfcae47edcb5f80d441bbfaf55db4f92e9
+us-docker.pkg.dev/grpc-testing/testing-images-public/python_alpine_aarch64:b6c1d533f32b4fc155d5ff062b476a43cd0bb142@sha256:ad38e1307cef00d8e99b65274f98af3645203caf6ab34226505509d85ac48819
diff --git a/tools/dockerfile/distribtest/python_alpine_aarch64/Dockerfile b/tools/dockerfile/distribtest/python_alpine_aarch64/Dockerfile
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # this an aarch64 image
-FROM arm64v8/python:3.13-alpine
+FROM arm64v8/python:3.14.0rc1-alpine
 
 # Our test infrastructure demands bash
 RUN apk update && apk add bash
diff --git a/tools/run_tests/artifacts/artifact_targets.py b/tools/run_tests/artifacts/artifact_targets.py
@@ -409,70 +409,80 @@ def targets():
             PythonArtifact("manylinux2014", "x64", "cp310-cp310"),
             PythonArtifact("manylinux2014", "x64", "cp311-cp311"),
             PythonArtifact("manylinux2014", "x64", "cp312-cp312"),
+            PythonArtifact("manylinux2014", "x64", "cp313-cp313"),
             PythonArtifact(
-                "manylinux2014", "x64", "cp313-cp313", presubmit=True
+                "manylinux2014", "x64", "cp314-cp314", presubmit=True
             ),
             PythonArtifact("manylinux2014", "x86", "cp39-cp39", presubmit=True),
             PythonArtifact("manylinux2014", "x86", "cp310-cp310"),
             PythonArtifact("manylinux2014", "x86", "cp311-cp311"),
             PythonArtifact("manylinux2014", "x86", "cp312-cp312"),
+            PythonArtifact("manylinux2014", "x86", "cp313-cp313"),
             PythonArtifact(
-                "manylinux2014", "x86", "cp313-cp313", presubmit=True
+                "manylinux2014", "x86", "cp314-cp314", presubmit=True
             ),
             PythonArtifact(
                 "manylinux2014", "aarch64", "cp39-cp39", presubmit=True
             ),
             PythonArtifact("manylinux2014", "aarch64", "cp310-cp310"),
             PythonArtifact("manylinux2014", "aarch64", "cp311-cp311"),
             PythonArtifact("manylinux2014", "aarch64", "cp312-cp312"),
+            PythonArtifact("manylinux2014", "aarch64", "cp313-cp313"),
             PythonArtifact(
-                "manylinux2014", "aarch64", "cp313-cp313", presubmit=True
+                "manylinux2014", "aarch64", "cp314-cp314", presubmit=True
             ),
             PythonArtifact("linux_extra", "armv7", "cp39-cp39", presubmit=True),
             PythonArtifact("linux_extra", "armv7", "cp310-cp310"),
             PythonArtifact("linux_extra", "armv7", "cp311-cp311"),
             PythonArtifact("linux_extra", "armv7", "cp312-cp312"),
+            PythonArtifact("linux_extra", "armv7", "cp313-cp313"),
             PythonArtifact(
-                "linux_extra", "armv7", "cp313-cp313", presubmit=True
+                "linux_extra", "armv7", "cp314-cp314", presubmit=True
             ),
             PythonArtifact("musllinux_1_2", "x64", "cp39-cp39", presubmit=True),
             PythonArtifact("musllinux_1_2", "x64", "cp310-cp310"),
             PythonArtifact("musllinux_1_2", "x64", "cp311-cp311"),
             PythonArtifact("musllinux_1_2", "x64", "cp312-cp312"),
+            PythonArtifact("musllinux_1_2", "x64", "cp313-cp313"),
             PythonArtifact(
-                "musllinux_1_2", "x64", "cp313-cp313", presubmit=True
+                "musllinux_1_2", "x64", "cp314-cp314", presubmit=True
             ),
             PythonArtifact("musllinux_1_2", "x86", "cp39-cp39", presubmit=True),
             PythonArtifact("musllinux_1_2", "x86", "cp310-cp310"),
             PythonArtifact("musllinux_1_2", "x86", "cp311-cp311"),
             PythonArtifact("musllinux_1_2", "x86", "cp312-cp312"),
+            PythonArtifact("musllinux_1_2", "x86", "cp313-cp313"),
             PythonArtifact(
-                "musllinux_1_2", "x86", "cp313-cp313", presubmit=True
+                "musllinux_1_2", "x86", "cp314-cp314", presubmit=True
             ),
             PythonArtifact(
                 "musllinux_1_2", "aarch64", "cp39-cp39", presubmit=True
             ),
             PythonArtifact("musllinux_1_2", "aarch64", "cp310-cp310"),
             PythonArtifact("musllinux_1_2", "aarch64", "cp311-cp311"),
             PythonArtifact("musllinux_1_2", "aarch64", "cp312-cp312"),
+            PythonArtifact("musllinux_1_2", "aarch64", "cp313-cp313"),
             PythonArtifact(
-                "musllinux_1_2", "aarch64", "cp313-cp313", presubmit=True
+                "musllinux_1_2", "aarch64", "cp314-cp314", presubmit=True
             ),
             PythonArtifact("macos", "x64", "python3.9", presubmit=True),
             PythonArtifact("macos", "x64", "python3.10"),
             PythonArtifact("macos", "x64", "python3.11"),
             PythonArtifact("macos", "x64", "python3.12"),
-            PythonArtifact("macos", "x64", "python3.13", presubmit=True),
+            PythonArtifact("macos", "x64", "python3.13"),
+            PythonArtifact("macos", "x64", "python3.14", presubmit=True),
             PythonArtifact("windows", "x86", "Python39_32bit", presubmit=True),
             PythonArtifact("windows", "x86", "Python310_32bit"),
             PythonArtifact("windows", "x86", "Python311_32bit"),
             PythonArtifact("windows", "x86", "Python312_32bit"),
-            PythonArtifact("windows", "x86", "Python313_32bit", presubmit=True),
+            PythonArtifact("windows", "x86", "Python313_32bit"),
+            PythonArtifact("windows", "x86", "Python314_32bit", presubmit=True),
             PythonArtifact("windows", "x64", "Python39", presubmit=True),
             PythonArtifact("windows", "x64", "Python310"),
             PythonArtifact("windows", "x64", "Python311"),
             PythonArtifact("windows", "x64", "Python312"),
-            PythonArtifact("windows", "x64", "Python313", presubmit=True),
+            PythonArtifact("windows", "x64", "Python313"),
+            PythonArtifact("windows", "x64", "Python314", presubmit=True),
             RubyArtifact("linux", "x86-mingw32", presubmit=True),
             RubyArtifact("linux", "x64-mingw-ucrt", presubmit=True),
             RubyArtifact("linux", "x86_64-linux-gnu", presubmit=True),
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
@@ -845,6 +845,13 @@ def _get_pythons(self, args):
             bits=bits,
             config_vars=config_vars,
         )
+        python314_config = _python_config_generator(
+            name="py314",
+            major="3",
+            minor="14",
+            bits=bits,
+            config_vars=config_vars,
+        )
         pypy27_config = _pypy_config_generator(
             name="pypy", major="2", config_vars=config_vars
         )
@@ -869,7 +876,7 @@ def _get_pythons(self, args):
                 # Default set tested on master. Test oldest and newest.
                 return (
                     python39_config,
-                    python313_config,
+                    python314_config,
                 )
         elif args.compiler == "python3.9":
             return (python39_config,)
@@ -881,6 +888,8 @@ def _get_pythons(self, args):
             return (python312_config,)
         elif args.compiler == "python3.13":
             return (python313_config,)
+        elif args.compiler == "python3.14":
+            return (python314_config,)
         elif args.compiler == "pypy":
             return (pypy27_config,)
         elif args.compiler == "pypy3":
@@ -894,6 +903,7 @@ def _get_pythons(self, args):
                 python311_config,
                 python312_config,
                 python313_config,
+                python314_config,
             )
         else:
             raise Exception("Compiler %s not supported." % args.compiler)
@@ -1731,6 +1741,7 @@ def _build_and_run(
         "python3.11",
         "python3.12",
         "python3.13",
+        "python3.14",
         "pypy",
         "pypy3",
         "python_alpine",

Original file line number	Diff line number	Diff line change
`@@ -68,6 +68,7 @@ PYTHON_VERSIONS = [`
`68`	`68`	`"3.11",`
`69`	`69`	`"3.12",`
`70`	`70`	`"3.13",`
	`71`	`+ "3.14.0b2",`
`71`	`72`	`]`
`72`	`73`
`73`	`74`	`python = use_extension("@rules_python//python/extensions:python.bzl", "python")`