chore!: drop Python 3.9 support

.github/workflows/build.yml

@@ -20,6 +20,9 @@ on:
 permissions:
   contents: read
 
+env:
+  TARGET_PYTHON_VERSION: "3.14"
+
 jobs:
   changes:
     runs-on: ubuntu-latest
@@ -60,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         package: ${{ fromJSON(needs.changes.outputs.packages) }}
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
@@ -82,15 +85,15 @@ jobs:
         run: uv build
 
       - name: Type checking
-        if: matrix.python-version == '3.13'
+        if: matrix.python-version == env.TARGET_PYTHON_VERSION
         working-directory: ${{ matrix.package }}
         run: poe mypy
 
       - name: Test with pytest
         working-directory: ${{ matrix.package }}
         run: poe cov
 
-      - if: matrix.python-version == '3.13'
+      - if: matrix.python-version == env.TARGET_PYTHON_VERSION
         name: Upload coverage to Codecov
         uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5.4.3
         with:
@@ -108,7 +111,7 @@ jobs:
       - name: Install uv and set the python version
         uses: astral-sh/setup-uv@6ee6290f1cbc4156c0bdd66691b2c144ef8df19a # v7
         with:
-          python-version: "3.13"
+          python-version: ${{ env.TARGET_PYTHON_VERSION }}
           enable-cache: false # caching is done automatically in `pre-commit/action`
 
       - name: Run pre-commit

.github/workflows/release.yml

@@ -11,6 +11,9 @@ on:
 permissions:
   contents: read
 
+env:
+  TARGET_PYTHON_VERSION: "3.14"
+
 jobs:
   release-please:
     runs-on: ubuntu-latest
@@ -54,7 +57,7 @@ jobs:
       - name: Install uv and set the python version
         uses: astral-sh/setup-uv@6ee6290f1cbc4156c0bdd66691b2c144ef8df19a # v7
         with:
-          python-version: "3.13"
+          python-version: ${{ env.TARGET_PYTHON_VERSION }}
 
       - name: Install dependencies
         working-directory: ${{ matrix.path }}

.python-version

@@ -0,0 +1 @@
+3.10

hooks/openfeature-hooks-opentelemetry/pyproject.toml

@@ -20,7 +20,7 @@ dependencies = [
     "opentelemetry-api",
     "opentelemetry-semantic-conventions>=0.50b0",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 
 [project.urls]
 Homepage = "https://github.com/open-feature/python-sdk-contrib"
@@ -30,7 +30,7 @@ dev = [
   "coverage[toml]>=7.10.0,<8.0.0",
   "mypy>=1.18.0,<2.0.0",
   "poethepoet>=0.37.0",
-  "pytest>=8.4.0,<9.0.0",
+  "pytest>=9.0.0,<10.0.0",
 ]
 
 [tool.uv.build-backend]
@@ -42,7 +42,7 @@ namespace = true
 mypy_path = "src"
 files = "src"
 
-python_version = "3.9" # should be identical to the minimum supported version
+python_version = "3.10" # should be identical to the minimum supported version
 namespace_packages = true
 explicit_package_bases = true
 local_partial_types = true # will become the new default from version 2
@@ -53,6 +53,9 @@ pretty = true
 strict = true
 disallow_any_generics = false
 
+[tool.pytest]
+strict = true
+
 [tool.poe.tasks]
 test = "pytest tests"
 test-cov = "coverage run -m pytest tests"

providers/openfeature-provider-aws-ssm/pyproject.toml

@@ -20,7 +20,7 @@ dependencies = [
     "boto3>=1.28.0",
     "cachebox>=5.1.0,<6.0.0",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 
 [project.optional-dependencies]
 async = ["aioboto3>=12.3.0"]
@@ -36,8 +36,8 @@ dev = [
   "coverage[toml]>=7.10.0,<8.0.0",
   "mypy>=1.18.0,<2.0.0",
   "poethepoet>=0.37.0",
-  "pytest>=8.4.0,<9.0.0",
-  "pytest-asyncio>=0.23.0",
+  "pytest>=9.0.0,<10.0.0",
+  "pytest-asyncio>=1.3.0,<2.0.0",
   "moto[ssm]>=5.0.0,<6.0.0",
 ]
 
@@ -50,7 +50,7 @@ namespace = true
 mypy_path = "src"
 files = "src"
 
-python_version = "3.9" # should be identical to the minimum supported version
+python_version = "3.10" # should be identical to the minimum supported version
 namespace_packages = true
 explicit_package_bases = true
 local_partial_types = true # will become the new default from version 2
@@ -66,6 +66,9 @@ omit = [
     "tests/**",
 ]
 
+[tool.pytest]
+strict = true
+
 [tool.poe.tasks]
 test = "pytest tests"
 test-cov = "coverage run -m pytest tests"

providers/openfeature-provider-aws-ssm/src/openfeature/contrib/provider/awsssm/config.py

@@ -65,6 +65,6 @@ class AwsSsmProviderConfig:
     """
 
     config: Optional["Config"] = None
-    endpoint_url: Optional[str] = None
+    endpoint_url: str | None = None
     enable_decryption: bool = False
-    cache_config: Optional[CacheConfig] = field(default_factory=CacheConfig)
+    cache_config: CacheConfig | None = field(default_factory=CacheConfig)

providers/openfeature-provider-aws-ssm/src/openfeature/contrib/provider/awsssm/parsers.py

@@ -1,5 +1,5 @@
 import json
-from typing import Any, Union
+from typing import Any
 
 from openfeature.exception import ParseError, TypeMismatchError
 
@@ -65,7 +65,7 @@ def parse_float(value: str) -> float:
         raise TypeMismatchError(f"Cannot parse '{value}' as float") from e
 
 
-def parse_object(value: str) -> Union[dict[str, Any], list[Any]]:
+def parse_object(value: str) -> dict[str, Any] | list[Any]:
     """
     Parse a string value as a JSON object.
 

providers/openfeature-provider-aws-ssm/src/openfeature/contrib/provider/awsssm/provider.py

@@ -1,5 +1,5 @@
-from collections.abc import Mapping, Sequence
-from typing import Any, Callable, Optional, TypeVar, Union, cast
+from collections.abc import Callable, Mapping, Sequence
+from typing import Any, TypeVar, cast
 
 from cachebox import BaseCacheImpl, LRUCache, TTLCache
 
@@ -17,7 +17,7 @@
 class AwsSsmProvider(AbstractProvider):
     """Provider for AWS Systems Manager Parameter Store."""
 
-    def __init__(self, config: Optional[AwsSsmProviderConfig] = None) -> None:
+    def __init__(self, config: AwsSsmProviderConfig | None = None) -> None:
         """
         Initialize the AWS SSM Provider.
 
@@ -31,7 +31,7 @@ def __init__(self, config: Optional[AwsSsmProviderConfig] = None) -> None:
             enable_decryption=self.config.enable_decryption,
         )
 
-        self.cache: Optional[BaseCacheImpl] = None
+        self.cache: BaseCacheImpl | None = None
         if self.config.cache_config:
             cache_config = self.config.cache_config
             if cache_config.cache_type == "lru":
@@ -48,7 +48,7 @@ def get_metadata(self) -> Metadata:
         """
         return Metadata(name="aws-ssm")
 
-    def _get_cached_value(self, flag_key: str) -> Optional[Any]:
+    def _get_cached_value(self, flag_key: str) -> Any | None:
         """
         Get value from cache if available.
 
@@ -76,7 +76,7 @@ def _set_cache_value(self, flag_key: str, value: Any) -> None:
     def _resolve_with_cache(
         self,
         flag_key: str,
-        parser: Optional[Callable[[str], T]] = None,
+        parser: Callable[[str], T] | None = None,
     ) -> FlagResolutionDetails[T]:
         """
         Base resolution logic with caching for synchronous operations.
@@ -108,7 +108,7 @@ def _resolve_with_cache(
     async def _resolve_with_cache_async(
         self,
         flag_key: str,
-        parser: Optional[Callable[[str], T]] = None,
+        parser: Callable[[str], T] | None = None,
     ) -> FlagResolutionDetails[T]:
         """
         Base resolution logic with caching for asynchronous operations.
@@ -141,7 +141,7 @@ def resolve_boolean_details(
         self,
         flag_key: str,
         default_value: bool,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[bool]:
         """
         Resolve a boolean flag.
@@ -160,7 +160,7 @@ def resolve_string_details(
         self,
         flag_key: str,
         default_value: str,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[str]:
         """
         Resolve a string flag.
@@ -179,7 +179,7 @@ def resolve_integer_details(
         self,
         flag_key: str,
         default_value: int,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[int]:
         """
         Resolve an integer flag.
@@ -198,7 +198,7 @@ def resolve_float_details(
         self,
         flag_key: str,
         default_value: float,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[float]:
         """
         Resolve a float flag.
@@ -216,11 +216,9 @@ def resolve_float_details(
     def resolve_object_details(
         self,
         flag_key: str,
-        default_value: Union[Sequence[FlagValueType], Mapping[str, FlagValueType]],
-        evaluation_context: Optional[EvaluationContext] = None,
-    ) -> FlagResolutionDetails[
-        Union[Sequence[FlagValueType], Mapping[str, FlagValueType]]
-    ]:
+        default_value: Sequence[FlagValueType] | Mapping[str, FlagValueType],
+        evaluation_context: EvaluationContext | None = None,
+    ) -> FlagResolutionDetails[Sequence[FlagValueType] | Mapping[str, FlagValueType]]:
         """
         Resolve an object flag.
 
@@ -239,7 +237,7 @@ async def resolve_boolean_details_async(
         self,
         flag_key: str,
         default_value: bool,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[bool]:
         """
         Resolve a boolean flag asynchronously.
@@ -258,7 +256,7 @@ async def resolve_string_details_async(
         self,
         flag_key: str,
         default_value: str,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[str]:
         """
         Resolve a string flag asynchronously.
@@ -277,7 +275,7 @@ async def resolve_integer_details_async(
         self,
         flag_key: str,
         default_value: int,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[int]:
         """
         Resolve an integer flag asynchronously.
@@ -296,7 +294,7 @@ async def resolve_float_details_async(
         self,
         flag_key: str,
         default_value: float,
-        evaluation_context: Optional[EvaluationContext] = None,
+        evaluation_context: EvaluationContext | None = None,
     ) -> FlagResolutionDetails[float]:
         """
         Resolve a float flag asynchronously.
@@ -314,11 +312,9 @@ async def resolve_float_details_async(
     async def resolve_object_details_async(
         self,
         flag_key: str,
-        default_value: Union[Sequence[FlagValueType], Mapping[str, FlagValueType]],
-        evaluation_context: Optional[EvaluationContext] = None,
-    ) -> FlagResolutionDetails[
-        Union[Sequence[FlagValueType], Mapping[str, FlagValueType]]
-    ]:
+        default_value: Sequence[FlagValueType] | Mapping[str, FlagValueType],
+        evaluation_context: EvaluationContext | None = None,
+    ) -> FlagResolutionDetails[Sequence[FlagValueType] | Mapping[str, FlagValueType]]:
         """
         Resolve an object flag asynchronously.
 

providers/openfeature-provider-aws-ssm/src/openfeature/contrib/provider/awsssm/ssm_service.py

@@ -1,4 +1,4 @@
-from typing import TYPE_CHECKING, Any, Optional
+from typing import TYPE_CHECKING, Any
 
 import boto3
 from botocore.config import Config
@@ -25,8 +25,8 @@ class SsmService:
 
     def __init__(
         self,
-        config: Optional[Config] = None,
-        endpoint_url: Optional[str] = None,
+        config: Config | None = None,
+        endpoint_url: str | None = None,
         enable_decryption: bool = False,
     ) -> None:
         """
@@ -38,8 +38,8 @@ def __init__(
             enable_decryption: Whether to decrypt SecureString parameters
         """
         self.enable_decryption = enable_decryption
-        self._client: Optional[SSMClient] = None
-        self._async_session: Optional[aioboto3.Session] = None
+        self._client: SSMClient | None = None
+        self._async_session: aioboto3.Session | None = None
         self._client_kwargs: dict[str, Any] = {}
         if endpoint_url:
             self._client_kwargs["endpoint_url"] = endpoint_url

providers/openfeature-provider-aws-ssm/tests/conftest.py

@@ -1,7 +1,7 @@
 from collections.abc import Awaitable, Callable, Generator, Iterator
 from contextlib import contextmanager
 from dataclasses import dataclass
-from typing import TypeVar, Union
+from typing import TypeVar
 
 import aiobotocore.endpoint
 import boto3
@@ -25,7 +25,7 @@
 class _PatchedAWSResponseContent:
     """Patched version of `botocore.awsrequest.AWSResponse.content`."""
 
-    content: Union[bytes, Awaitable[bytes]]
+    content: bytes | Awaitable[bytes]
 
     def decode(self, encoding: str) -> str:
         assert isinstance(self.content, bytes)