chore!: drop Python 3.8 support (#441)

* drop Python 3.8 support

Signed-off-by: gruebel <anton.gruebel@gmail.com>

* pin mypy python version to 3.9

Signed-off-by: gruebel <anton.gruebel@gmail.com>

---------

Signed-off-by: gruebel <anton.gruebel@gmail.com>
Co-authored-by: Michael Beemer <beeme1mr@users.noreply.github.com>

.github/workflows/build.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -44,7 +44,7 @@ jobs:
       - name: Run E2E tests with behave
         run: hatch run e2e
 
-      - if: matrix.python-version == '3.11'
+      - if: matrix.python-version == '3.13'
         name: Upload coverage to Codecov
         uses: codecov/codecov-action@13ce06bfc6bbe3ecf90edbbf1bc32fe5978ca1d3 # v5.3.1
         with:
@@ -61,7 +61,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5
         with:
-          python-version: "3.11"
+          python-version: "3.13"
           cache: "pip"
 
       - name: Run pre-commit
@@ -77,7 +77,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5
         with:
-          python-version: "3.11"
+          python-version: "3.13"
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@9e8d0789d4a0fa9ceb6b1738f7e269594bdd67f0 # v3

.pre-commit-config.yaml

@@ -1,4 +1,4 @@
-default_stages: [commit]
+default_stages: [pre-commit]
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
     rev: v0.9.6

CONTRIBUTING.md

@@ -4,11 +4,11 @@
 
 ### System Requirements
 
-Python 3.8 and above are required.
+Python 3.9 and above are required.
 
 ### Target version(s)
 
-Python 3.8 and above are supported by the SDK.
+Python 3.9 and above are supported by the SDK.
 
 ### Installation and Dependencies
 

README.md

@@ -34,7 +34,7 @@
   </a>
 
   <a href="https://www.python.org/downloads/">
-    <img alt="Min python version" src="https://img.shields.io/badge/python->=3.8-blue.svg" />
+    <img alt="Min python version" src="https://img.shields.io/badge/python->=3.9-blue.svg" />
   </a>
 
   <a href="https://www.repostatus.org/#wip">
@@ -51,7 +51,7 @@
 
 ### Requirements
 
-- Python 3.8+
+- Python 3.9+
 
 ### Install
 

openfeature/_event_support.py

@@ -2,7 +2,7 @@
 
 import threading
 from collections import defaultdict
-from typing import TYPE_CHECKING, Dict, List
+from typing import TYPE_CHECKING
 
 from openfeature.event import (
     EventDetails,
@@ -17,10 +17,10 @@
 
 
 _global_lock = threading.RLock()
-_global_handlers: Dict[ProviderEvent, List[EventHandler]] = defaultdict(list)
+_global_handlers: dict[ProviderEvent, list[EventHandler]] = defaultdict(list)
 
 _client_lock = threading.RLock()
-_client_handlers: Dict[OpenFeatureClient, Dict[ProviderEvent, List[EventHandler]]] = (
+_client_handlers: dict[OpenFeatureClient, dict[ProviderEvent, list[EventHandler]]] = (
     defaultdict(lambda: defaultdict(list))
 )
 

openfeature/api.py

@@ -40,7 +40,7 @@
     NoOpTransactionContextPropagator()
 )
 
-_hooks: typing.List[Hook] = []
+_hooks: list[Hook] = []
 
 
 def get_client(
@@ -96,7 +96,7 @@ def set_transaction_context(evaluation_context: EvaluationContext) -> None:
     )
 
 
-def add_hooks(hooks: typing.List[Hook]) -> None:
+def add_hooks(hooks: list[Hook]) -> None:
     global _hooks
     _hooks = _hooks + hooks
 
@@ -106,7 +106,7 @@ def clear_hooks() -> None:
     _hooks = []
 
 
-def get_hooks() -> typing.List[Hook]:
+def get_hooks() -> list[Hook]:
     return _hooks
 
 

openfeature/client.py

@@ -77,14 +77,14 @@
         typing.Awaitable[FlagResolutionDetails[typing.Union[dict, list]]],
     ],
 ]
-TypeMap = typing.Dict[
+TypeMap = dict[
     FlagType,
     typing.Union[
-        typing.Type[bool],
-        typing.Type[int],
-        typing.Type[float],
-        typing.Type[str],
-        typing.Tuple[typing.Type[dict], typing.Type[list]],
+        type[bool],
+        type[int],
+        type[float],
+        type[str],
+        tuple[type[dict], type[list]],
     ],
 ]
 
@@ -101,7 +101,7 @@ def __init__(
         domain: typing.Optional[str],
         version: typing.Optional[str],
         context: typing.Optional[EvaluationContext] = None,
-        hooks: typing.Optional[typing.List[Hook]] = None,
+        hooks: typing.Optional[list[Hook]] = None,
     ) -> None:
         self.domain = domain
         self.version = version
@@ -118,7 +118,7 @@ def get_provider_status(self) -> ProviderStatus:
     def get_metadata(self) -> ClientMetadata:
         return ClientMetadata(domain=self.domain)
 
-    def add_hooks(self, hooks: typing.List[Hook]) -> None:
+    def add_hooks(self, hooks: list[Hook]) -> None:
         self.hooks = self.hooks + hooks
 
     def get_boolean_value(
@@ -423,12 +423,12 @@ def _establish_hooks_and_provider(
         default_value: typing.Any,
         evaluation_context: typing.Optional[EvaluationContext],
         flag_evaluation_options: typing.Optional[FlagEvaluationOptions],
-    ) -> typing.Tuple[
+    ) -> tuple[
         FeatureProvider,
         HookContext,
         HookHints,
-        typing.List[Hook],
-        typing.List[Hook],
+        list[Hook],
+        list[Hook],
     ]:
         if evaluation_context is None:
             evaluation_context = EvaluationContext()
@@ -477,7 +477,7 @@ def _before_hooks_and_merge_context(
         self,
         flag_type: FlagType,
         hook_context: HookContext,
-        merged_hooks: typing.List[Hook],
+        merged_hooks: list[Hook],
         hook_hints: HookHints,
         evaluation_context: typing.Optional[EvaluationContext],
     ) -> EvaluationContext:

openfeature/event.py

@@ -2,7 +2,7 @@
 
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import Callable, Dict, List, Optional, Union
+from typing import Callable, Optional, Union
 
 from openfeature.exception import ErrorCode
 
@@ -18,19 +18,19 @@ class ProviderEvent(Enum):
 
 @dataclass
 class ProviderEventDetails:
-    flags_changed: Optional[List[str]] = None
+    flags_changed: Optional[list[str]] = None
     message: Optional[str] = None
     error_code: Optional[ErrorCode] = None
-    metadata: Dict[str, Union[bool, str, int, float]] = field(default_factory=dict)
+    metadata: dict[str, Union[bool, str, int, float]] = field(default_factory=dict)
 
 
 @dataclass
 class EventDetails(ProviderEventDetails):
     provider_name: str = ""
-    flags_changed: Optional[List[str]] = None
+    flags_changed: Optional[list[str]] = None
     message: Optional[str] = None
     error_code: Optional[ErrorCode] = None
-    metadata: Dict[str, Union[bool, str, int, float]] = field(default_factory=dict)
+    metadata: dict[str, Union[bool, str, int, float]] = field(default_factory=dict)
 
     @classmethod
     def from_provider_event_details(

openfeature/flag_evaluation.py

@@ -58,7 +58,7 @@ class FlagEvaluationDetails(typing.Generic[T_co]):
 
 @dataclass
 class FlagEvaluationOptions:
-    hooks: typing.List[Hook] = field(default_factory=list)
+    hooks: list[Hook] = field(default_factory=list)
     hook_hints: HookHints = field(default_factory=dict)
 
 

openfeature/hook/__init__.py

@@ -60,8 +60,8 @@ def __setattr__(self, key: str, value: typing.Any) -> None:
         float,
         str,
         datetime,
-        typing.List[typing.Any],
-        typing.Dict[str, typing.Any],
+        list[typing.Any],
+        dict[str, typing.Any],
     ],
 ]
 

openfeature/hook/_hook_support.py

@@ -13,7 +13,7 @@ def error_hooks(
     flag_type: FlagType,
     hook_context: HookContext,
     exception: Exception,
-    hooks: typing.List[Hook],
+    hooks: list[Hook],
     hints: typing.Optional[HookHints] = None,
 ) -> None:
     kwargs = {"hook_context": hook_context, "exception": exception, "hints": hints}
@@ -26,7 +26,7 @@ def after_all_hooks(
     flag_type: FlagType,
     hook_context: HookContext,
     details: FlagEvaluationDetails[typing.Any],
-    hooks: typing.List[Hook],
+    hooks: list[Hook],
     hints: typing.Optional[HookHints] = None,
 ) -> None:
     kwargs = {"hook_context": hook_context, "details": details, "hints": hints}
@@ -39,7 +39,7 @@ def after_hooks(
     flag_type: FlagType,
     hook_context: HookContext,
     details: FlagEvaluationDetails[typing.Any],
-    hooks: typing.List[Hook],
+    hooks: list[Hook],
     hints: typing.Optional[HookHints] = None,
 ) -> None:
     kwargs = {"hook_context": hook_context, "details": details, "hints": hints}
@@ -51,7 +51,7 @@ def after_hooks(
 def before_hooks(
     flag_type: FlagType,
     hook_context: HookContext,
-    hooks: typing.List[Hook],
+    hooks: list[Hook],
     hints: typing.Optional[HookHints] = None,
 ) -> EvaluationContext:
     kwargs = {"hook_context": hook_context, "hints": hints}
@@ -68,7 +68,7 @@ def before_hooks(
 
 def _execute_hooks(
     flag_type: FlagType,
-    hooks: typing.List[Hook],
+    hooks: list[Hook],
     hook_method: HookType,
     **kwargs: typing.Any,
 ) -> list:
@@ -91,10 +91,10 @@ def _execute_hooks(
 
 def _execute_hooks_unchecked(
     flag_type: FlagType,
-    hooks: typing.List[Hook],
+    hooks: list[Hook],
     hook_method: HookType,
     **kwargs: typing.Any,
-) -> typing.List[typing.Optional[EvaluationContext]]:
+) -> list[typing.Optional[EvaluationContext]]:
     """
     Execute a single hook without checking whether an exception is thrown. This is
     used in the before and after hooks since any exception will be caught in the

openfeature/provider/__init__.py

@@ -38,7 +38,7 @@ def shutdown(self) -> None: ...
 
     def get_metadata(self) -> Metadata: ...
 
-    def get_provider_hooks(self) -> typing.List[Hook]: ...
+    def get_provider_hooks(self) -> list[Hook]: ...
 
     def resolve_boolean_details(
         self,
@@ -134,7 +134,7 @@ def shutdown(self) -> None:
     def get_metadata(self) -> Metadata:
         pass
 
-    def get_provider_hooks(self) -> typing.List[Hook]:
+    def get_provider_hooks(self) -> list[Hook]:
         return []
 
     @abstractmethod

openfeature/provider/_registry.py

@@ -13,8 +13,8 @@
 
 class ProviderRegistry:
     _default_provider: FeatureProvider
-    _providers: typing.Dict[str, FeatureProvider]
-    _provider_status: typing.Dict[FeatureProvider, ProviderStatus]
+    _providers: dict[str, FeatureProvider]
+    _provider_status: dict[FeatureProvider, ProviderStatus]
 
     def __init__(self) -> None:
         self._default_provider = NoOpProvider()

openfeature/provider/in_memory_provider.py

@@ -26,7 +26,7 @@ class State(StrEnum):
         DISABLED = "DISABLED"
 
     default_variant: str
-    variants: typing.Dict[str, T_co]
+    variants: dict[str, T_co]
     flag_metadata: FlagMetadata = field(default_factory=dict)
     state: State = State.ENABLED
     context_evaluator: typing.Optional[
@@ -51,7 +51,7 @@ def resolve(
         )
 
 
-FlagStorage = typing.Dict[str, InMemoryFlag[typing.Any]]
+FlagStorage = dict[str, InMemoryFlag[typing.Any]]
 
 V = typing.TypeVar("V")
 
@@ -65,7 +65,7 @@ def __init__(self, flags: FlagStorage) -> None:
     def get_metadata(self) -> Metadata:
         return InMemoryMetadata()
 
-    def get_provider_hooks(self) -> typing.List[Hook]:
+    def get_provider_hooks(self) -> list[Hook]:
         return []
 
     def resolve_boolean_details(

openfeature/provider/no_op_provider.py

@@ -13,7 +13,7 @@ class NoOpProvider(AbstractProvider):
     def get_metadata(self) -> Metadata:
         return NoOpMetadata()
 
-    def get_provider_hooks(self) -> typing.List[Hook]:
+    def get_provider_hooks(self) -> list[Hook]:
         return []
 
     def resolve_boolean_details(

pyproject.toml

@@ -22,7 +22,7 @@ keywords = [
     "toggles",
 ]
 dependencies = []
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 [project.urls]
 Homepage = "https://github.com/open-feature/python-sdk"
@@ -66,21 +66,26 @@ packages = ["openfeature"]
 
 [tool.mypy]
 files = "openfeature"
+
+python_version = "3.9" # 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
 pretty = true
 strict = true
 disallow_any_generics = false
 
+[tool.pytest.ini_options]
+asyncio_default_fixture_loop_scope = "function"
+
 [tool.ruff]
 exclude = [
     ".git",
     ".venv",
     "__pycache__",
     "venv",
 ]
-target-version = "py38"
+target-version = "py39"
 
 [tool.ruff.lint]
 select = [