Drop Python 3.9 support

.github/workflows/lint.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.10", "3.11", "3.12", "3.13"]
 
     name: "Python ${{ matrix.python }}"
     runs-on: ubuntu-24.04

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-24.04", "windows-2025"]
-        python: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python: ["3.10", "3.11", "3.12", "3.13"]
 
     name: "${{ matrix.os }} / Python ${{ matrix.python }}"
     runs-on: ${{ matrix.os }}

README.md

@@ -38,7 +38,7 @@ CharonLoad reduces the burden to start writing and experimenting with custom GPU
 
 ## Installation
 
-CharonLoad requires **Python >=3.9** and can be installed from PyPI:
+CharonLoad requires **Python >=3.10** and can be installed from PyPI:
 
 ```sh
 pip install charonload

noxfile.py

@@ -71,7 +71,9 @@ def docs_live(session: nox.Session) -> None:
     # sphinx-build
     force_building = "-E"
     watch_dirs_and_files = ["src", "README.md", "CHANGELOG.md"]
-    watch_args = [v for pair in zip(["--watch"] * len(watch_dirs_and_files), watch_dirs_and_files) for v in pair]
+    watch_args = [
+        v for pair in zip(["--watch"] * len(watch_dirs_and_files), watch_dirs_and_files, strict=True) for v in pair
+    ]
     session.run(
         "sphinx-autobuild",
         "-b",

pyproject.toml

@@ -4,9 +4,10 @@ version = "0.2.1"
 authors = [{ name = "Patrick Stotko", email = "[email protected]" }]
 description = "Develop C++/CUDA extensions with PyTorch like Python scripts"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "cmake>=3.27",
+    'dlltracer ; platform_system == "Windows"',
     'ninja ; platform_system != "Windows"',
     "filelock",
     "torch",
@@ -21,7 +22,6 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: C++",
     "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",
@@ -92,7 +92,7 @@ line-length = 120
 [tool.isort]
 profile = "black"
 multi_line_output = 3
-py_version = 39
+py_version = 310
 
 
 [tool.docformatter]

src/charonload/__init__.py

@@ -20,7 +20,7 @@
 
 import sys
 
-required_version = (3, 8)
+required_version = (3, 10)
 
 if sys.version_info[:2] < required_version:  # pragma: no cover
     msg = "%s requires Python %d.%d+" % (__package__, *required_version)  # noqa: UP031

src/charonload/_compat/hashlib.py

@@ -2,9 +2,10 @@
 
 import sys
 from hashlib import *  # noqa: F403
-from typing import TYPE_CHECKING, BinaryIO, Callable
+from typing import TYPE_CHECKING, BinaryIO
 
 if TYPE_CHECKING:
+    from collections.abc import Callable
     from hashlib import _Hash
 
 

src/charonload/_config.py

@@ -11,7 +11,7 @@
 import sysconfig
 import tempfile
 from collections import UserDict
-from dataclasses import dataclass
+from dataclasses import KW_ONLY, dataclass
 from typing import TYPE_CHECKING
 
 import colorama
@@ -22,7 +22,7 @@
 colorama.just_fix_windows_console()
 
 
-@dataclass(init=False)  # Python 3.10+: Use "_: KW_ONLY"
+@dataclass
 class Config:
     """
     Set of user-specified configuration options for setting up the import logic of :class:`JITCompileFinder`.
@@ -33,14 +33,16 @@ class Config:
     project_directory: pathlib.Path | str
     """The absolute path to the root directory of the C++/CUDA extension containing the root ``CMakeLists.txt`` file."""
 
-    build_directory: pathlib.Path | str | None
+    build_directory: pathlib.Path | str | None = None
     """
     An optional absolute path to a build directory.
 
     If not specified, the build will be placed in the temporary directory of the operating system.
     """
 
-    clean_build: bool
+    _: KW_ONLY
+
+    clean_build: bool = False
     """
     Whether to remove all cached files of previous builds from the build directory.
 
@@ -53,13 +55,13 @@ class Config:
       :class:`ResolvedConfig`.
     """
 
-    build_type: str
+    build_type: str = "RelWithDebInfo"
     """The build type passed to CMake to compile the extension."""
 
-    cmake_options: dict[str, str] | None
+    cmake_options: dict[str, str] | None = None
     """Additional CMake options to pass to the project when JIT compiling."""
 
-    stubs_directory: pathlib.Path | str | None
+    stubs_directory: pathlib.Path | str | None = None
     """
     An optional absolute path to the directory where stub files of the extension should be generated.
 
@@ -68,7 +70,7 @@ class Config:
     if set to ``None``.
     """
 
-    stubs_invalid_ok: bool
+    stubs_invalid_ok: bool = False
     """
     Whether to accept invalid stubs and skip raising an error.
 
@@ -79,7 +81,7 @@ class Config:
       :class:`ResolvedConfig`.
     """
 
-    verbose: bool
+    verbose: bool = False
     """
     Whether to enable printing the full log of the JIT compilation.
 
@@ -92,36 +94,17 @@ class Config:
       :class:`ResolvedConfig`.
     """
 
-    def __init__(
-        self: Self,
-        project_directory: pathlib.Path | str,
-        build_directory: pathlib.Path | str | None = None,
-        *,
-        clean_build: bool = False,
-        build_type: str = "RelWithDebInfo",
-        cmake_options: dict[str, str] | None = None,
-        stubs_directory: pathlib.Path | str | None = None,
-        stubs_invalid_ok: bool = False,
-        verbose: bool = False,
-    ) -> None:
-        self.project_directory = project_directory
-        self.build_directory = build_directory
-        self.clean_build = clean_build
-        self.build_type = build_type
-        self.cmake_options = cmake_options
-        self.stubs_directory = stubs_directory
-        self.stubs_invalid_ok = stubs_invalid_ok
-        self.verbose = verbose
-
-
-@dataclass(init=False)  # Python 3.10+: Use "kw_only=True"
+
+@dataclass
 class ResolvedConfig:
     """
     Set of resolved configuration options that is **actually used** in the import logic of :class:`JITCompileFinder`.
 
     This has been resolved from :class:`Config` and from the environment variables.
     """
 
+    _: KW_ONLY
+
     full_project_directory: pathlib.Path
     """The full absolute path to the project directory."""
 
@@ -146,27 +129,6 @@ class ResolvedConfig:
     verbose: bool
     """Flag to enable printing the full log of the JIT compilation."""
 
-    def __init__(
-        self: Self,
-        *,
-        full_project_directory: pathlib.Path,
-        full_build_directory: pathlib.Path,
-        clean_build: bool,
-        build_type: str,
-        cmake_options: dict[str, str],
-        full_stubs_directory: pathlib.Path | None,
-        stubs_invalid_ok: bool,
-        verbose: bool,
-    ) -> None:
-        self.full_project_directory = full_project_directory
-        self.full_build_directory = full_build_directory
-        self.clean_build = clean_build
-        self.build_type = build_type
-        self.cmake_options = cmake_options
-        self.full_stubs_directory = full_stubs_directory
-        self.stubs_invalid_ok = stubs_invalid_ok
-        self.verbose = verbose
-
 
 class ConfigDict(UserDict[str, ResolvedConfig]):
     """

src/charonload/_persistence.py

@@ -6,12 +6,13 @@
 import pathlib
 import sys
 from dataclasses import dataclass
-from typing import TYPE_CHECKING, Any, Callable
+from typing import TYPE_CHECKING, Any
 
 from ._errors import _SerializerNotConnectedError
 
 if TYPE_CHECKING:  # pragma: no cover
     import enum
+    from collections.abc import Callable
 
     from ._compat.typing import Self