feat: support python 3.14

.kokoro/presubmit/prerelease-deps-3.14.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "prerelease_deps-3.14"
+}

.kokoro/presubmit/system-3.14.cfg

@@ -0,0 +1,7 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+# Only run this nox session.
+env_vars: {
+    key: "NOX_SESSION"
+    value: "system-3.14"
+}

noxfile.py

@@ -34,7 +34,7 @@
 
 DEFAULT_PYTHON_VERSION = "3.10"
 
-UNIT_TEST_PYTHON_VERSIONS: List[str] = ["3.9", "3.11", "3.12", "3.13"]
+UNIT_TEST_PYTHON_VERSIONS: List[str] = ["3.9", "3.11", "3.12", "3.13", "3.14"]
 UNIT_TEST_STANDARD_DEPENDENCIES = [
     "mock",
     "asyncmock",

setup.py

@@ -52,7 +52,8 @@
         # grpc.Channel.close() method isn't added until 1.32.0.
         # https://github.com/grpc/grpc/pull/15254
         "grpcio >= 1.47.0, < 2.0.0",
-        "grpcio >= 1.49.1, < 2.0.0; python_version>='3.11'",
+        "grpcio >= 1.49.1, < 2.0.0; python_version >= '3.11' and python_version < '3.14'",
+        "grpcio >= 1.75.1, < 2.0.0; python_version >= '3.14'",
     ],
     "bigframes": ["bigframes >= 1.17.0"],
     "geopandas": ["geopandas >= 1.0.1"],
@@ -110,6 +111,7 @@
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Operating System :: OS Independent",
         "Topic :: Internet",
     ],

testing/constraints-3.14.txt

@@ -0,0 +1,2 @@
+# IMPORTANT: When Python 3.12 support is dropped, update these to
+# match the minimums in setup.py.