set python 3.14 as the default version

Author: parthea

CONTRIBUTING.rst

@@ -143,12 +143,12 @@ Running System Tests
    $ nox -s system
 
    # Run a single system test
-   $ nox -s system-3.19 -- -k <name of test>
+   $ nox -s system-3.14 -- -k <name of test>
 
 
   .. note::
 
-      System tests are only configured to run under Python 3.19.
+      System tests are only configured to run under Python 3.14.
       For expediency, we do not run them in older versions of Python 3.
 
   This alone will not run the tests. You'll need to change some local

noxfile.py

@@ -32,7 +32,7 @@
 ISORT_VERSION = "isort==5.11.0"
 LINT_PATHS = ["docs", "google", "tests", "noxfile.py", "setup.py"]
 
-DEFAULT_PYTHON_VERSION = "3.13"
+DEFAULT_PYTHON_VERSION = "3.14"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
     "3.9",
@@ -389,15 +389,15 @@ def docfx(session):
     )
 
 
-@nox.session(python="3.14")
+@nox.session(python=DEFAULT_PYTHON_VERSION)
 @nox.parametrize(
     "protobuf_implementation",
     ["python", "upb", "cpp"],
 )
 def prerelease_deps(session, protobuf_implementation):
     """Run all tests with prerelease versions of dependencies installed."""
 
-    if protobuf_implementation == "cpp" and session.python in ("3.11", "3.12", "3.13"):
+    if protobuf_implementation == "cpp" and session.python in ("3.11", "3.12", "3.13", "3.14"):
         session.skip("cpp implementation is not supported in python 3.11+")
 
     # Install all dependencies

setup.py

@@ -44,6 +44,8 @@
     "google-cloud-audit-log >= 0.3.1, < 1.0.0",
     "google-cloud-core >= 2.0.0, <3.0.0",
     "grpc-google-iam-v1 >=0.12.4, <1.0.0",
+    "grpcio >= 1.33.2, < 2.0.0",
+    "grpcio >= 1.75.1, < 2.0.0; python_version >= '3.14'",
     "opentelemetry-api >= 1.9.0",
     "proto-plus >= 1.22.0, <2.0.0",
     "proto-plus >= 1.22.2, <2.0.0; python_version>='3.11'",