fix: Require Python 3.9 by parthea · Pull Request #16102 · googleapis/google-cloud-python

parthea · 2026-03-13T15:36:08Z

No description provided.

gemini-code-assist · 2026-03-13T15:37:58Z

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request systematically updates the Python version requirements across multiple packages within the repository. The core objective is to deprecate support for Python 3.7 and 3.8, establishing Python 3.9 as the new minimum supported version. This change is reflected in various configuration files, build scripts, and documentation, ensuring consistency with current Python ecosystem standards and end-of-life policies. The update also includes a simplification of testing configurations by removing specific protobuf implementation tests that are no longer relevant or supported.

Highlights

Python Version Update: The minimum required Python version for several packages has been updated from Python 3.7 or 3.8 to Python 3.9, aligning with Python's end-of-life cycles.
Testing Configuration Simplification: Noxfile configurations across various packages were updated to remove Python 3.7 and 3.8 from unit and system test versions. Additionally, the 'cpp' protobuf implementation was removed from testing parameters, simplifying test matrices.
Documentation and Metadata Updates: Project documentation (CONTRIBUTING.rst, README.rst) and setup.py files were updated to reflect the new Python 3.9 requirement, including changes to classifiers and python_requires metadata.
Dependency Constraints Management: Constraints files for Python 3.7 and 3.8 were removed, and the constraints-3.9.txt files were updated or created to reflect the new minimum dependency versions for Python 3.9.

Changelog

packages/bigquery-magics/CONTRIBUTING.rst
- Removed 'Samples and code snippets' section.
packages/bigquery-magics/mypy.ini
- Updated 'python_version' from '3.8' to '3.14'.
packages/bigquery-magics/noxfile.py
- Removed Python 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Removed 'ALL_PYTHON' variable and its extension with '3.7'.
- Simplified 'unit' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
packages/bigquery-magics/setup.py
- Removed 'Programming Language :: Python :: 3.8' classifier.
- Updated 'python_requires' from '>=3.8' to '>=3.9'.
packages/bigquery-magics/testing/constraints-3.8.txt
- Removed file.
packages/bigquery-magics/testing/constraints-3.9.txt
- Added 'packaging=20.0.0' to constraints.
packages/db-dtypes/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.8.
- Removed 'Samples and code snippets' section.
- Updated explicit support statement from Python 3.7 to Python 3.9.
packages/db-dtypes/noxfile.py
- Removed Python 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Removed 'ALL_PYTHON' variable and its extension with '3.7'.
- Removed TODO comment related to 'owlbot-python' docker image and Python 3.8.
- Updated 'unit' session to use 'UNIT_TEST_PYTHON_VERSIONS' and removed Python 3.7 skip.
packages/db-dtypes/setup.py
- Removed 'Programming Language :: Python :: 3.8' classifier.
- Updated 'python_requires' from '>=3.8' to '>=3.9'.
packages/db-dtypes/testing/constraints-3.8.txt
- Removed file.
packages/db-dtypes/testing/constraints-3.9.txt
- Added content for constraints.
packages/google-auth-httplib2/noxfile.py
- Removed Python 3.7 and 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
packages/google-auth-httplib2/setup.py
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
packages/google-auth-httplib2/testing/constraints-3.7.txt
- Removed file.
packages/google-auth-httplib2/testing/constraints-3.9.txt
- Added content for constraints.
packages/google-auth-oauthlib/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.7 and 3.8.
- Updated system test command example from 'system-3.8' to 'system-3.12'.
- Updated note about system tests running under Python 3.8 to Python 3.12.
- Removed 'Samples and code snippets' section.
- Updated explicit support statement from Python 3.7 to Python 3.9.
packages/google-auth-oauthlib/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '< 3.7' to '<= 3.8'.
- Removed specific notes about last compatible versions for Python 2.7, 3.5, and 3.6.
packages/google-auth-oauthlib/noxfile.py
- Removed TODO comment about Python 3.7/3.8 testing.
- Removed Python 3.7 and 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Simplified 'unit' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
packages/google-auth-oauthlib/setup.py
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
packages/google-auth-oauthlib/testing/constraints-3.7.txt
- Removed file.
packages/google-auth/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.8.
packages/google-auth/README.rst
- Updated supported Python versions from '>= 3.8' to '>= 3.9'.
- Updated note about unsupported Python versions, removing Python 3.8 and adjusting Python 3.9 note.
- Added a note about the last supported version for Python 3.8.
packages/google-auth/noxfile.py
- Removed Python 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Removed 'ALL_PYTHON' variable and its extension with '3.7'.
- Updated 'unit' session to use 'UNIT_TEST_PYTHON_VERSIONS' and removed Python 3.7 skip.
packages/google-auth/setup.py
- Updated 'python_requires' from '>=3.8' to '>=3.9'.
- Removed 'Programming Language :: Python :: 3.8' classifier.
packages/google-auth/testing/constraints-3.8.txt
- Removed file.
packages/google-auth/testing/constraints-3.9.txt
- Removed 'setuptools==40.3.0' from constraints.
- Added content for constraints.
packages/google-cloud-access-context-manager/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-access-context-manager/docs/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-access-context-manager/noxfile.py
- Removed Python 3.7 and 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Removed Python 3.8 from 'SYSTEM_TEST_PYTHON_VERSIONS'.
- Simplified 'unit' session by removing 'protobuf_implementation="cpp"' and related conditional skips.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation="cpp"'.
packages/google-cloud-access-context-manager/setup.py
- Updated 'protobuf' dependency from '>=3.20.2,<7.0.0' to '>=4.25.8,<8.0.0'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-access-context-manager/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-access-context-manager/testing/constraints-3.9.txt
- Updated 'protobuf' version to '4.25.8' in constraints.
- Added content for constraints.
packages/google-cloud-audit-log/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-audit-log/docs/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-audit-log/noxfile.py
- Removed Python 3.7 and 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Removed Python 3.8 from 'SYSTEM_TEST_PYTHON_VERSIONS'.
- Simplified 'unit' session by removing 'protobuf_implementation="cpp"' and related conditional skips.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation="cpp"'.
packages/google-cloud-audit-log/setup.py
- Updated 'protobuf' dependency from '>=3.20.2,<7.0.0' to '>=4.25.8,<8.0.0'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-audit-log/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-audit-log/testing/constraints-3.8.txt
- Removed file.
packages/google-cloud-audit-log/testing/constraints-3.9.txt
- Added content for constraints.
- Updated 'protobuf' version to '4.25.8' in constraints.
packages/google-cloud-core/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.8.
- Updated system test command example from 'system-3.8' to 'system-3.12'.
- Updated note about system tests running under Python 3.8 to Python 3.12.
- Removed 'Samples and code snippets' section.
- Updated explicit support statement from Python 3.8 to Python 3.9.
packages/google-cloud-core/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from specific notes about Python 2.7/3.6 to '<= 3.8'.
packages/google-cloud-core/noxfile.py
- Removed Python 3.7 and 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation="cpp"'.
- Simplified 'core_deps_from_source' session by removing 'protobuf_implementation="cpp"'.
packages/google-cloud-core/setup.py
- Removed 'importlib-metadata' dependency for Python versions less than 3.8.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-core/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-core/testing/constraints-3.9.txt
- Added content for constraints.
packages/google-cloud-dns/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.7 and 3.8.
- Removed 'Samples and code snippets' section.
- Updated explicit support statement from Python 3.7 to Python 3.9.
packages/google-cloud-dns/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-dns/noxfile.py
- Removed Python 3.7 and 3.8 from 'ALL_PYTHON'.
- Removed 'types-protobuf' from mypy session dependencies.
- Simplified 'unit' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
- Simplified 'core_deps_from_source' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
packages/google-cloud-dns/setup.py
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-dns/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-dns/testing/constraints-3.9.txt
- Added content for constraints.
packages/google-cloud-documentai-toolbox/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.8.
- Removed 'Samples and code snippets' section.
- Updated explicit support statement from Python 3.8 to Python 3.9.
packages/google-cloud-documentai-toolbox/README.rst
- Updated supported Python versions from '>= 3.8' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.7' to '<= 3.8' and removed specific notes about Python 3.7.
packages/google-cloud-documentai-toolbox/noxfile.py
- Removed Python 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Removed 'ALL_PYTHON' variable and its extension with '3.7'.
- Simplified 'unit' session by removing 'protobuf_implementation="cpp"' and related conditional skips.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation="cpp"'.
packages/google-cloud-documentai-toolbox/setup.py
- Updated 'python_requires' from '>=3.8' to '>=3.9'.
- Removed 'Programming Language :: Python :: 3.8' classifier.
packages/google-cloud-documentai-toolbox/testing/constraints-3.8.txt
- Removed file.
packages/google-cloud-documentai-toolbox/testing/constraints-3.9.txt
- Added content for constraints and updated header comments.
packages/google-cloud-ndb/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.7 and 3.8.
- Updated unit test command example from 'unit-3.10' and 'unit-3.7' to 'unit-3.14'.
packages/google-cloud-ndb/README.md
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-ndb/noxfile.py
- Updated 'ALL_INTERPRETERS' to remove Python 3.7 and 3.8.
- Removed 'EMULTATOR_INTERPRETERS' variable.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation="cpp"'.
packages/google-cloud-ndb/setup.py
- Updated 'protobuf' dependency from '>=3.20.2,<7.0.0' to '>=4.25.8,<8.0.0'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-ndb/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-ndb/testing/constraints-3.9.txt
- Updated 'protobuf' version to '4.25.8' in constraints.
- Added content for constraints.
packages/google-cloud-runtimeconfig/CONTRIBUTING.rst
- Updated supported CPython versions list, removing Python 3.7 and 3.8.
- Updated system test command example from 'system-3.8' to 'system-3.12'.
- Updated note about system tests running under Python 3.8 to Python 3.12.
- Removed 'Samples and code snippets' section.
- Updated explicit support statement from Python 3.7 to Python 3.9.
packages/google-cloud-runtimeconfig/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from '<= 3.6' to '<= 3.8'.
packages/google-cloud-runtimeconfig/noxfile.py
- Removed Python 3.7 and 3.8 from 'UNIT_TEST_PYTHON_VERSIONS'.
- Simplified 'unit' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
- Simplified 'prerelease_deps' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
- Simplified 'core_deps_from_source' session by removing 'protobuf_implementation' parametrization and related conditional skips and environment variables.
packages/google-cloud-runtimeconfig/setup.py
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-runtimeconfig/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-runtimeconfig/testing/constraints-3.9.txt
- Added content for constraints.
packages/google-cloud-testutils/noxfile.py
- Updated 'ALL_PYTHON' to remove Python 3.7 and 3.8.
- Updated 'system' session to use 'constraints-3.9.txt' instead of 'constraints-3.7.txt'.
- Updated 'update_lower_bounds' session to use 'constraints-3.9.txt' instead of 'constraints-3.7.txt'.
packages/google-cloud-testutils/setup.py
- Removed 'importlib_metadata' dependency for Python versions less than 3.8.
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
packages/google-cloud-testutils/testing/constraints-3.7.txt
- Removed file.
packages/google-cloud-testutils/testing/constraints-3.9.txt
- Added content for constraints.
packages/google-cloud-testutils/tests/unit/resources/bad_package/setup.py
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-cloud-testutils/tests/unit/resources/good_package/setup.py
- Updated 'python_requires' from '>=3.7' to '>=3.9'.
packages/google-resumable-media/README.rst
- Updated supported Python versions from '>= 3.7' to '>= 3.9'.
- Updated unsupported Python versions from specific notes about Python 2.7/3.5/3.6 to '<= 3.8'.
packages/google-resumable-media/noxfile.py
- Updated 'UNIT_TEST_PYTHON_VERSIONS' to remove Python 3.7 and 3.8.
packages/google-resumable-media/setup.py
- Updated 'python_requires' from '>= 3.7' to '>= 3.9'.
- Removed 'Programming Language :: Python :: 3.7' and '3.8' classifiers.
packages/google-resumable-media/testing/constraints-3.7.txt
- Removed file.
packages/google-resumable-media/testing/constraints-3.9.txt
- Added content for constraints.

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Code Review

This pull request updates multiple packages to require Python 3.9 as the minimum version, dropping support for Python 3.7 and 3.8. The changes are extensive, touching configuration files (setup.py, noxfile.py), documentation (README.rst, CONTRIBUTING.rst), and testing infrastructure (constraints-*.txt). The updates are largely consistent and correct across all affected packages. I've pointed out a couple of minor issues in the new testing constraints files for your consideration.

gemini-code-assist · 2026-03-13T15:41:30Z

packages/google-cloud-runtimeconfig/testing/constraints-3.9.txt

+#
+# e.g., if setup.py has "foo >= 1.14.0, < 2.0.0dev",
+# Then this file should have foo==1.14.0
+


This blank line is unnecessary and can be removed for cleanliness.

gemini-code-assist · 2026-03-13T15:41:30Z

packages/google-cloud-testutils/testing/constraints-3.9.txt

+# Then this file should have foo==1.14.0
+click==7.0.0
+google-auth==0.4.0
+importlib_metadata==1.0.0


importlib_metadata is part of the standard library in Python 3.8+ (as importlib.metadata). Since the minimum Python version for this package is now 3.9, this dependency is no longer needed and should be removed from this constraints file. It has already been correctly removed from setup.py.

fix: Require Python 3.9

fb3a9ad

gemini-code-assist bot reviewed Mar 13, 2026

View reviewed changes

parthea added 5 commits March 13, 2026 15:47

fix: fix tests

4aaff19

fix: fix tests

bae7a58

fix: fix tests

f8a86dc

fix: fix tests

5bfe867

fix: fix tests

0397401

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fix: Require Python 3.9#16102

fix: Require Python 3.9#16102
parthea wants to merge 6 commits intomainfrom
require-python-39

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parthea commented Mar 13, 2026

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