DEP: drop support for EOL Python 3.8 and (soon-to-be-EOL) 3.9, require 3.10 or newer, add explicit support for 3.14

Author: neutrinoceros

.github/workflows/cibuildwheel.yml

@@ -42,15 +42,14 @@ jobs:
 
     - name: Build just oldest and newest on PRs, all on tags
       shell: bash
-      # - Always omit musl 3.8 b/c NumPy does not provide wheels for it
       # - Always omit musllinux_aarch64 because it's slow and niche
       # - On PPs, omit musllinux for speed
-      # - On PRs, run just oldest and newest Python versions (and omit 3.8 aarch64)
+      # - On PRs, run just oldest and newest Python versions (3.11 is the oldest abi3 target)
       run: |
         if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-          CIBW_SKIP="cp38-* cp39-* cp310-* cp311-* cp38-*_aarch64 *musllinux*"
+          CIBW_SKIP="cp3{12,13}-* *musllinux*"
         else
-          CIBW_SKIP="cp38-* *musllinux_aarch64"
+          CIBW_SKIP="*musllinux_aarch64"
         fi
         echo "CIBW_SKIP=$CIBW_SKIP" >> $GITHUB_ENV
         echo "Setting CIBW_SKIP=$CIBW_SKIP"

.github/workflows/tests_conda.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.9", "3.10", "3.11", "3.12", "3.13" ]
+        python-version: [ "3.10", "3.11", "3.12", "3.13" ]
         os: [windows-latest, ubuntu-latest, macos-latest]
         platform: [x64, x32]
         experimental: [false]

pyproject.toml

@@ -15,18 +15,17 @@ classifiers = [
     'Operating System :: POSIX :: Linux',
     'Programming Language :: Python',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.8',
-    'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',
     'Programming Language :: Python :: 3.13',
+    'Programming Language :: Python :: 3.14',
     'Topic :: Scientific/Engineering',
 ]
 dependencies = [
     "numpy>1.13.3",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 
 [dependency-groups]
 dev = [
@@ -44,8 +43,7 @@ dev = [
 requires = [
     "setuptools>=77.0.1",
     "cython>=0.29.20",
-    "oldest-supported-numpy ; python_version < '3.9'",
-    "numpy>=2.0.0,<3 ; python_version >= '3.9'",
+    "numpy>=2.0.0,<3",
 ]
 build-backend = "setuptools.build_meta"
 
@@ -110,10 +108,10 @@ skip = [
     "*musllinux_aarch64*",
 ]
 
-# Emulated testing is slow, so trust that the Python 3.12 test is good enough on aarch64
+# Emulated testing is slow, so trust that the Python 3.14 test is good enough on aarch64
 # (takes about 5 minutes per wheel to build, and 5 minutes to test)
 test-skip = [
-    "cp3{8,9,10,11}-*_aarch64",
+    "cp3{10,11,12,13}-*_aarch64",
 ]
 test-groups = "dev"
 test-command = [