build: drop python 3.9 support (#1427)

Signed-off-by: arielle <me@arielle.codes>
Signed-off-by: Zenith <me@arielle.codes>
Co-authored-by: vi <8530778+shiftinv@users.noreply.github.com>

Author: onerandomusername

.github/actions/setup-env/action.yml

@@ -6,7 +6,7 @@ inputs:
   python-version:
     description: The python version to install
     required: false
-    default: '3.9'
+    default: '3.10'
   use-cached-uv-lock:
     description: Whether to download the uv lock cache.
     required: false

.github/workflows/create-release-pr.yaml

@@ -45,7 +45,7 @@ jobs:
       - name: Set up environment
         uses: ./.github/actions/setup-env
         with:
-          python-version: 3.9
+          python-version: 3.10
 
       - name: Install dependencies
         run: uv sync --no-default-groups --group changelog

.github/workflows/release.yaml

@@ -25,7 +25,7 @@ jobs:
         id: setup
         uses: ./.github/actions/setup-env
         with:
-          python-version: 3.9
+          python-version: 3.10
 
       - name: Build package
         run: |

.readthedocs.yml

@@ -6,7 +6,7 @@ formats:
 build:
   os: ubuntu-24.04
   tools:
-    python: "3.9"
+    python: "3.10"
   jobs:
     create_environment:
       - asdf plugin add uv

README.md

@@ -26,7 +26,7 @@ Key Features
 Installing
 ----------
 
-**Python 3.9 or higher is required.**
+**Python 3.10 or higher is required.**
 
 To install the library without full voice support, you can just run the
 following command:

changelog/1394.breaking.rst

@@ -1 +1 @@
-Python 3.8 support has been dropped.
+Drop support for Python 3.8 as it reached end of life in October 2024 and no longer receives security updates.

changelog/1427.breaking.rst

@@ -0,0 +1 @@
+Drop support for Python 3.9 as it reached end of life in October 2025 and no longer receives security updates.

disnake/ext/commands/core.py

@@ -393,8 +393,7 @@ def callback(self, function: CommandCallback[CogT, Any, P, T]) -> None:
                 str(e)
                 + ", please check all annotations are defined outside of TYPE_CHECKING blocks."
             )
-            # todo: add name kw only argument once we use py310+
-            raise NameError(msg) from None
+            raise NameError(msg, name=e.name) from None
 
         for param in params.values():
             if param.annotation is Greedy:

disnake/ext/commands/params.py

@@ -10,12 +10,12 @@
 import inspect
 import itertools
 import math
-import sys
 import types
 from abc import ABC, abstractmethod
 from collections.abc import Sequence
 from dataclasses import dataclass
 from enum import Enum, EnumMeta
+from types import EllipsisType, UnionType
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -82,16 +82,6 @@
     P = TypeVar("P")
 
 
-if sys.version_info >= (3, 10):
-    from types import EllipsisType, UnionType
-elif TYPE_CHECKING:
-    EllipsisType = type(Ellipsis)
-    UnionType = NoReturn
-
-else:
-    UnionType = object()
-    EllipsisType = type(Ellipsis)
-
 T = TypeVar("T")
 TypeT = TypeVar("TypeT", bound=type[Any])
 BotT = TypeVar("BotT", bound="disnake.Client", covariant=True)
@@ -356,10 +346,8 @@ def __call__(self) -> NoReturn:
         raise NotImplementedError
 
     # support new union syntax for `Range[int, 1, 2] | None`
-    if sys.version_info >= (3, 10):
-
-        def __or__(self, other):
-            return Union[self, other]
+    def __or__(self, other):
+        return Union[self, other]
 
 
 if TYPE_CHECKING:

disnake/ext/commands/slash_core.py

@@ -310,8 +310,7 @@ def __init__(
                     str(e)
                     + ", please check all annotations are defined outside of TYPE_CHECKING blocks."
                 )
-                # todo: add name kw only argument once we use py310+
-                raise NameError(msg) from None
+                raise NameError(msg, name=e.name) from None
 
         self.docstring = utils.parse_docstring(func)
         desc_loc = Localized._cast(description, False)
@@ -485,8 +484,7 @@ def __init__(
                     str(e)
                     + ", please check all annotations are defined outside of TYPE_CHECKING blocks."
                 )
-                # todo: add name kw only argument once we use py310+
-                raise NameError(msg) from None
+                raise NameError(msg, name=e.name) from None
 
         self.docstring = utils.parse_docstring(func)
         desc_loc = Localized._cast(description, False)