chore: revert back to 3.10+ support

Author: chalmerlowe

packages/bigframes/noxfile.py

@@ -54,7 +54,7 @@
 
 DEFAULT_PYTHON_VERSION = "3.14"
 
-ALL_PYTHON = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+ALL_PYTHON = ["3.10", "3.11", "3.12", "3.13", "3.14"]
 UNIT_TEST_STANDARD_DEPENDENCIES = [
     "mock",
     PYTEST_VERSION,
@@ -253,8 +253,8 @@ def run_unit(session, install_test_extra):
 
 @nox.session(python=ALL_PYTHON)
 def unit(session):
-    if session.python in ("3.7",):
-        session.skip("Python 3.7 is no longer supported")
+    if session.python in ("3.7", "3.8", "3.9"):
+        session.skip("Python 3.9 and below are not supported")
     run_unit(session, install_test_extra=True)
 
 

packages/bigframes/setup.py

@@ -141,7 +141,6 @@
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
@@ -158,7 +157,7 @@
         "bigframes_vendored": "third_party/bigframes_vendored",
     },
     packages=packages,
-    python_requires=">=3.9",
+    python_requires=">=3.10",
     include_package_data=True,
     zip_safe=False,
 )