Chore/drop py39 support

.github/workflows/sdk-upgrade.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.10
 
       - name: Install protobuf dependencies & kfp-pipeline-spec
         id: install-protobuf-deps

.github/workflows/sdk-yapf.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.9'
+        python-version: '3.10'
 
     - name: Install dependencies
       run: pip install yapf

kubernetes_platform/python/setup.py

@@ -20,6 +20,7 @@
 
 NAME = 'kfp-kubernetes'
 
+
 def get_requirements(requirements_file: str) -> List[str]:
     """Read requirements from requirements.in."""
 
@@ -30,6 +31,7 @@ def get_requirements(requirements_file: str) -> List[str]:
     lines = [line for line in lines if not line.startswith('#') and line]
     return lines
 
+
 def find_version(*file_path_parts: str) -> str:
     """Get version from kfp.__init__.__version__."""
 
@@ -72,7 +74,7 @@ def read_readme() -> str:
             'https://github.com/kubeflow/pipelines/tree/master/kubernetes_platform/python',
     },
     packages=setuptools.find_namespace_packages(include=['kfp.*']),
-    python_requires='>=3.9.0',
+    python_requires='>=3.10.0',
     install_requires=get_requirements('requirements.txt'),
     include_package_data=True,
     extras_require={

sdk/python/setup.py

@@ -87,7 +87,6 @@ def read_readme() -> str:
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: Apache Software License',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
@@ -98,7 +97,7 @@ def read_readme() -> str:
         'Topic :: Software Development :: Libraries',
         'Topic :: Software Development :: Libraries :: Python Modules',
     ],
-    python_requires='>=3.9.0',
+    python_requires='>=3.10.0',
     include_package_data=True,
     entry_points={
         'console_scripts': [