Drop support for Python 3.9

.github/workflows/ci.yml

@@ -68,14 +68,15 @@ jobs:
       matrix:
         python-version:
           [
-            "3.9",
             "3.10",
             "3.11",
             "3.14",
             "3.13",
             "3.13t",
             "3.14",
             "3.14t",
+            "3.15",
+            "3.15t",
             "pypy-3.11",
             "graalpy25.0",
           ]
@@ -131,14 +132,6 @@ jobs:
                 rust-target: "aarch64-unknown-linux-gnu",
               }
         exclude:
-          # macOS arm doesn't have Python builds before 3.10
-          - python-version: 3.9
-            platform:
-              {
-                os: "macos-latest",
-                python-architecture: "arm64",
-                rust-target: "aarch64-apple-darwin",
-              }
           # no graalpy available on Windows
           - python-version: graalpy25.0
             platform:

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## Unreleased
+### Packaging
+- Drop support for Python 3.9.
+- Bump `setuptools` minimum version to 83.0.
+
 ## 1.13.0 (2026-06-27)
 ### Added
 - Add `generated-files` option to `RustExtension` to copy files from the build script output directory to the wheel. [#574](https://github.com/PyO3/setuptools-rust/pull/574)

README.md

@@ -69,7 +69,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-pyo3 = "0.25"
+pyo3 = "0.28"
 
 [lib]
 name = "_lib"  # private module to be nested into Python package,

docs/conf.py

@@ -80,12 +80,10 @@ def basetext(o):
             for t in node.traverse(basetext):
                 t1 = Text(t.replace(DOCS_URL, "", 1), t.rawsource)
                 t.parent.replace(t, t1)
-        return
 
 
 # end of class
 
 
 def setup(app):
     app.add_transform(RelativeDocLinks)
-    return

examples/generated-files/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 build = "build.rs"
 
 [dependencies]
-pyo3 = "0.27"
+pyo3 = "0.28"
 
 [lib]
 name = "_lib"  # private module to be nested into Python package

examples/generated-files/python/generated_files/__init__.py

@@ -1,6 +1,7 @@
-__all__ = ["library_ok", "data_files_content"]
+__all__ = ["data_files_content", "library_ok"]
 
 from pathlib import Path
+
 from ._lib import library_ok
 
 

examples/generated-files/tests/test_lib.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+
 import generated_files
 
 

examples/html-py-ever/pyproject.toml

@@ -7,15 +7,17 @@ name = "html-py-ever"
 version = "0.1.0"
 license = { text = "MIT" }
 readme = "README.md"
-requires-python = ">=3.6"
+requires-python = ">=3.10"
 classifiers = [
     "License :: OSI Approved :: MIT License",
     "Intended Audience :: Developers",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.7",
-    "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",
+    "Programming Language :: Python :: 3.15",
     "Development Status :: 5 - Production/Stable",
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",

examples/html-py-ever/tests/conftest.py

@@ -1,4 +1,5 @@
 import sys
+
 import pytest
 
 if sys.platform == "emscripten":

examples/html-py-ever/tests/run_all.py

@@ -2,7 +2,6 @@
 import os
 from glob import glob
 from time import perf_counter
-from typing import Tuple
 
 import html_py_ever
 from bs4 import BeautifulSoup
@@ -13,7 +12,7 @@
     lxml = None
 
 
-def rust(filename: str) -> Tuple[int, float, float]:
+def rust(filename: str) -> tuple[int, float, float]:
     start_load = perf_counter()
     doc = html_py_ever.parse_file(filename)
     end_load = perf_counter()
@@ -25,7 +24,7 @@ def rust(filename: str) -> Tuple[int, float, float]:
     return len(links), end_load - start_load, end_search - start_search
 
 
-def python(filename: str, parser: str) -> Tuple[int, float, float]:
+def python(filename: str, parser: str) -> tuple[int, float, float]:
     start_load = perf_counter()
     with open(filename, encoding="utf8") as fp:
         soup = BeautifulSoup(fp, parser)

examples/html-py-ever/tests/test_parsing.py

@@ -1,13 +1,12 @@
 #!/usr/bin/env python
-from glob import glob
 import os
+from glob import glob
 
 import html_py_ever
 import pytest
 from bs4 import BeautifulSoup
 from html_py_ever import Document
 
-
 HTML_FILES = glob(os.path.join(os.path.dirname(__file__), "*.html"))
 
 

examples/namespace_package/tests/test_namespace_package.py

@@ -1,4 +1,4 @@
-from namespace_package import rust, python
+from namespace_package import python, rust
 
 
 def test_rust():

examples/rust_with_cffi/cffi_module.py

@@ -1,6 +1,5 @@
 import cffi
 
-
 ffi = cffi.FFI()
 ffi.cdef(
     """

examples/rust_with_cffi/setup.py

@@ -1,5 +1,5 @@
-#!/usr/bin/env python
 from setuptools import find_packages, setup
+
 from setuptools_rust import RustExtension
 
 setup(

noxfile.py

@@ -1,11 +1,11 @@
 import os
-from contextlib import ExitStack
-from inspect import cleandoc as heredoc
-from glob import glob
-from pathlib import Path
 import shutil
 import sys
 import tempfile
+from contextlib import ExitStack
+from glob import glob
+from inspect import cleandoc as heredoc
+from pathlib import Path
 
 import nox
 import nox.command

pyproject.toml

@@ -3,7 +3,7 @@ name = "setuptools-rust"
 version = "1.13.0"
 description = "Setuptools Rust extension plugin"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 keywords = ["distutils", "setuptools", "rust"]
 authors = [
     {name = "Nikolay Kim", email = "fafhrd91@gmail.com"},
@@ -13,18 +13,20 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Intended Audience :: Developers",
     "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",
+    "Programming Language :: Python :: 3.15",
     "Development Status :: 5 - Production/Stable",
     "Operating System :: POSIX",
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: Microsoft :: Windows",
 ]
 
 dependencies = [
-    "setuptools>=62.4",
+    "setuptools>=83.0",
     "semantic_version>=2.8.2,<3",
 ]
 

setuptools_rust/_utils.py

@@ -1,5 +1,5 @@
 import subprocess
-from typing import Any, Optional, Union, cast
+from typing import Any, cast
 
 
 class Env:
@@ -8,9 +8,9 @@ class Env:
     Dictionaries are unhashable, but ``functools.lru_cache`` needs all parameters to
     be hashable, which we solve which a custom ``__hash__``."""
 
-    env: Optional[dict[str, str]]
+    env: dict[str, str] | None
 
-    def __init__(self, env: Optional[dict[str, str]]):
+    def __init__(self, env: dict[str, str] | None):
         self.env = env
 
     def __eq__(self, other: object) -> bool:
@@ -26,17 +26,17 @@ def __hash__(self) -> int:
 
 
 def run_subprocess(
-    *args: Any, env: Union[Env, dict[str, str], None], **kwargs: Any
+    *args: Any, env: Env | dict[str, str] | None, **kwargs: Any
 ) -> subprocess.CompletedProcess:
     """Wrapper around subprocess.run that requires a decision to pass env."""
     if isinstance(env, Env):
         env = env.env
     kwargs["env"] = env
-    return subprocess.run(*args, **kwargs)  # noqa: TID251 # this is a wrapper to implement the rule
+    return subprocess.run(*args, **kwargs)  # noqa: PLW1510, TID251 # this is a wrapper to implement the rule
 
 
 def check_subprocess_output(
-    *args: Any, env: Union[Env, dict[str, str], None], **kwargs: Any
+    *args: Any, env: Env | dict[str, str] | None, **kwargs: Any
 ) -> str:
     """Wrapper around subprocess.run that requires a decision to pass env."""
     if isinstance(env, Env):