scientific-python · henryiii · Oct 8, 2025 · Oct 8, 2025
diff --git a/.github/workflows/reusable-cookie.yml b/.github/workflows/reusable-cookie.yml
@@ -24,11 +24,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.13"]
+        python-version: ["3.10", "3.14"]
         runs-on: [ubuntu-latest, windows-latest, macos-latest]
 
         include:
-          - python-version: pypy-3.10
+          - python-version: pypy-3.11
             runs-on: ubuntu-latest
 
     steps:
@@ -38,9 +38,6 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           allow-prereleases: true
-          # Python 3.13.4 broken on Windows
-          check-latest: >-
-            ${{ matrix.python-version == '3.13' && runner.os == 'Windows' }}
 
       - name: Setup uv
         uses: astral-sh/setup-uv@v7
@@ -76,7 +73,7 @@ jobs:
         run: nox -s 'tests(setuptools, novcs)' -s 'tests(setuptools, vcs)'
 
       - name: Native poetry tooling
-        if: matrix.python-version != 'pypy-3.10'
+        if: matrix.python-version != 'pypy-3.11'
         run: |
           nox -s 'native(poetry, novcs)'
           nox -s 'native(poetry, vcs)'

diff --git a/.github/workflows/reusable-rr-tests.yml b/.github/workflows/reusable-rr-tests.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         runs-on: [ubuntu-latest, macos-14, windows-latest]
 
     steps:

diff --git a/README.md b/README.md
@@ -125,7 +125,7 @@ Check the key setup files, `pyproject.toml`, and possibly `setup.cfg` and
 `setup.py` (pybind11 example). Update `README.md`. Also update and add docs to
 `docs/`.
 
-There are a few example dependencies and a minimum Python version of 3.9, feel
+There are a few example dependencies and a minimum Python version of 3.10, feel
 free to change it to whatever you actually need/want. There is also a basic
 backports structure with a small typing example.
 

diff --git a/docs/_includes/pyproject.md b/docs/_includes/pyproject.md
@@ -15,7 +15,7 @@ authors = [
 maintainers = [
   { name = "My Organization", email = "[email protected]" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 
 dependencies = [
   "typing_extensions",
@@ -24,11 +24,11 @@ dependencies = [
 classifiers = [
   "Development Status :: 4 - Beta",
   "Programming Language :: Python :: 3 :: Only",
-  "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 :: Physics",
 ]
 

diff --git a/docs/pages/guides/gha_basic.md b/docs/pages/guides/gha_basic.md
@@ -99,9 +99,9 @@ tests:
     fail-fast: false
     matrix:
       python-version:
-        - "3.9"
-        - "3.11"
-        - "3.13"
+        - "3.10"
+        - "3.12"
+        - "3.14"
   name: Check Python ${{ matrix.python-version }}
   steps:
     - uses: actions/checkout@v5

diff --git a/docs/pages/guides/packaging_classic.md b/docs/pages/guides/packaging_classic.md
@@ -288,11 +288,11 @@ classifiers =
     Programming Language :: C++
     Programming Language :: Python
     Programming Language :: Python :: 3 :: Only
-    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
     Topic :: Scientific/Engineering :: Information Analysis
     Topic :: Scientific/Engineering :: Mathematics
@@ -310,7 +310,7 @@ project_urls =
 packages = find:
 install_requires =
     numpy>=1.19.3
-python_requires = >=3.9
+python_requires = >=3.10
 include_package_data = True
 package_dir =
     =src

diff --git a/docs/pages/guides/packaging_compiled.md b/docs/pages/guides/packaging_compiled.md
@@ -183,8 +183,8 @@ rand = "0.8.3"
 [dependencies.pyo3]
 version = "0.19.1"
 # "extension-module" tells pyo3 we want to build an extension module (skips linking against libpython.so)
-# "abi3-py39" tells pyo3 (and maturin) to build using the stable ABI with minimum Python version 3.9
-features = ["extension-module", "abi3-py39"]
+# "abi3-py310" tells pyo3 (and maturin) to build using the stable ABI with minimum Python version 3.10
+features = ["extension-module", "abi3-py310"]
 ```
 <!-- prettier-ignore-end -->
 <!-- [[[end]]] -->

diff --git a/docs/pages/guides/style.md b/docs/pages/guides/style.md
@@ -555,7 +555,7 @@ this:
 ```ini
 [tool.mypy]
 files = "src"
-python_version = "3.9"
+python_version = "3.10"
 strict = true
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 warn_unreachable = true
@@ -840,7 +840,7 @@ started:
 
 ```toml
 [tool.pylint]
-py-version = "3.9"
+py-version = "3.10"
 jobs = "0"
 reports.output-format = "colorized"
 similarities.ignore-imports = "yes"

diff --git a/docs/pages/guides/tasks.md b/docs/pages/guides/tasks.md
@@ -86,7 +86,7 @@ customize the versions of Python prepared for you, then use input like this:
 ```yaml
 - uses: wntrblm/[email protected]
   with:
-    python-versions: "3.9, 3.10, 3.11, 3.12, 3.13, pypy-3.10"
+    python-versions: "3.10, 3.11, 3.12, 3.13, 3.13t, 3.14, 3.14t, pypy-3.11"
 ```
 
 ### Introduction
@@ -137,7 +137,7 @@ You can parametrize sessions. either on Python or on any other item.
 
 ```python
 # Shortcut to parametrize Python
-@nox.session(python=["3.9", "3.10", "3.11", "3.12", "3.13"])
+@nox.session(python=["3.10", "3.11", "3.12", "3.13", "3.14"])
 def my_session(session: nox.Session) -> None: ...
 
 

diff --git a/{{cookiecutter.project_name}}/.github/workflows/ci.yml b/{{cookiecutter.project_name}}/.github/workflows/ci.yml
@@ -44,11 +44,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.13"]
-        runs-on: [ubuntu-latest, windows-latest, macos-14]
+        python-version: ["3.10", "3.14"]
+        runs-on: [ubuntu-latest, windows-latest, macos-latest]
 
         include:
-          - python-version: "pypy-3.10"
+          - python-version: "pypy-3.11"
             runs-on: ubuntu-latest
 
     steps:
@@ -60,13 +60,6 @@ jobs:
         with:
           python-version: {% raw %}${{ matrix.python-version }}{% endraw %}
           allow-prereleases: true
-          {%- if cookiecutter.__type == "compiled" %}
-          {%- raw %}
-          # Python 3.13.4 broken on Windows
-          check-latest: >-
-            ${{ matrix.python-version == '3.13' && runner.os == 'Windows' }}
-          {%- endraw %}
-          {%- endif %}
 
       - uses: astral-sh/setup-uv@v6
 

diff --git a/{{cookiecutter.project_name}}/pyproject.toml b/{{cookiecutter.project_name}}/pyproject.toml
@@ -79,7 +79,7 @@ license = "MIT"
 {%- endif %}
 license-files = ["LICENSE"]
 {%- endif %}
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
   "Development Status :: 1 - Planning",
   "Intended Audience :: Science/Research",
@@ -97,11 +97,11 @@ classifiers = [
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3 :: Only",
-  "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",
   "Typing :: Typed",
 ]
@@ -252,7 +252,7 @@ report.exclude_also = [
 
 [tool.mypy]
 files = ["src", "tests"]
-python_version = "3.9"
+python_version = "3.10"
 warn_unused_configs = true
 strict = true
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
@@ -309,7 +309,7 @@ isort.required-imports = ["from __future__ import annotations"]
 
 
 [tool.pylint]
-py-version = "3.9"
+py-version = "3.10"
 ignore-paths = [".*/_version.py"]
 {%- if cookiecutter.__type == "compiled" %}
 extension-pkg-allow-list = ["{{ cookiecutter.__project_slug }}._core"]

diff --git a/{{cookiecutter.project_name}}/{% if cookiecutter.__ci=='gitlab' %}.gitlab-ci.yml{% endif %} b/{{cookiecutter.project_name}}/{% if cookiecutter.__ci=='gitlab' %}.gitlab-ci.yml{% endif %}
@@ -14,7 +14,7 @@ cache:
     - .cache/pip
     - .venv/
 
-image: python:3.9-buster
+image: python:3.10-buster
 before_script:
   # want to set up a virtualenv to cache
   - apt-get install -y --no-install-recommends git
@@ -79,7 +79,7 @@ tests:
     - python -m pytest -ra --cov={{ cookiecutter.project_name }}
   parallel:
     matrix:
-      - IMAGE: ['python:3.9-buster', 'python:3.11-buster']
+      - IMAGE: ['python:3.10-buster', 'python:3.11-buster']
 
 {%- if cookiecutter.__type == "pure" %}
 

diff --git a/{{cookiecutter.project_name}}/{% if cookiecutter.backend=='maturin' %}Cargo.toml{% endif %} b/{{cookiecutter.project_name}}/{% if cookiecutter.backend=='maturin' %}Cargo.toml{% endif %}
@@ -14,5 +14,5 @@ rand = "0.8.3"
 [dependencies.pyo3]
 version = "0.19.1"
 # "extension-module" tells pyo3 we want to build an extension module (skips linking against libpython.so)
-# "abi3-py39" tells pyo3 (and maturin) to build using the stable ABI with minimum Python version 3.9
-features = ["extension-module", "abi3-py39"]
+# "abi3-py310" tells pyo3 (and maturin) to build using the stable ABI with minimum Python version 3.10
+features = ["extension-module", "abi3-py310"]