BLD: Support free-threaded CPython and ship 3.14t/3.15/3.15t wheels

.github/workflows/linux.yml

@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15", "3.15t"]
         config: 
         - {
             name: "Ubuntu (GCC-14)",

.github/workflows/macos.yml

@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.14t", "3.15", "3.15t"]
         config: 
         - {
             name: "macOS (Clang)",

.github/workflows/nonvendored_wheels.yml

@@ -55,7 +55,7 @@ jobs:
         python-version: '3.11'
 
     - name: Install cibuildwheel
-      run: python -m pip install cibuildwheel==3.4.1
+      run: python -m pip install cibuildwheel==4.3.1
 
     - name: Build wheel
       run: python -m cibuildwheel --output-dir wheelhouse

.github/workflows/valgrind.yml

@@ -23,7 +23,7 @@ jobs:
         uses: fkirc/skip-duplicate-actions@master
         with:
           # All of these options are optional, so you can remove them if you are happy with the defaults
-          cancel_others: 'true'
+          cancel_others: "true"
           do_not_skip: '["pull_request", "workflow_dispatch", "schedule"]'
   build:
     name: Valgrind
@@ -39,7 +39,7 @@ jobs:
 
       - uses: actions/setup-python@v7
         with:
-          python-version: '3.10'
+          python-version: "3.10"
 
       - name: Install dependencies on ubuntu
         run: |
@@ -57,6 +57,7 @@ jobs:
 
       - name: Configure
         run: |
+          export CXXFLAGS="${CXXFLAGS} -march=x86-64-v3"
           cmake -S . -G Ninja -B build \
               -DSKBUILD_PROJECT_NAME="diptest" \
               -DSKBUILD_PROJECT_VERSION="0.0.0" \

.github/workflows/wheels.yml

@@ -80,7 +80,7 @@ jobs:
             -DCMAKE_INSTALL_PREFIX="$HOME/.local/libomp"
         cmake --build openmp_build --target install --config Release
 
-    - uses: pypa/cibuildwheel@v3.4.1
+    - uses: pypa/cibuildwheel@v4.3.1
       env:
         CIBW_ENVIRONMENT: CMAKE_ARGS="-DDIPTEST_ENABLE_ARCH_FLAGS=OFF -DDIPTEST_ENABLE_OPENMP=ON"
         CIBW_TEST_COMMAND: pytest {project}/tests && python -c "from diptest import _has_openmp_support; assert _has_openmp_support"
@@ -137,7 +137,7 @@ jobs:
             -DCMAKE_INSTALL_PREFIX="/usr/local"
         cmake --build openmp_build --target install --config Release
 
-    - uses: pypa/cibuildwheel@v3.4.1
+    - uses: pypa/cibuildwheel@v4.3.1
       env:
         # only build for x86_64, arm wheels are build seperately
         CIBW_ARCHS: "x86_64"

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Diptest Changelog
 
+## Unreleased
+
+### Changes
+
+* BLD: Support free-threaded CPython; ship cp314t, cp315 and cp315t wheels
+* BLD: Drop psutil dependency, the number of cores is now determined with `os.process_cpu_count`/`os.cpu_count`
+* BLD: Drop cp38 wheels, the sdist still supports Python 3.8
+* BLD: Fix sdist include path for the C++ sources
+* CICD: Bump cibuildwheel from 3.4.1 to 4.3.1
+
 ## 0.11.0 -- April 2026
 
 This release significantly improves bootstrapping performance by avoiding the sorting of the generated uniform sample.

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["scikit-build-core>=0.3.3", "pybind11"]
+requires = ["scikit-build-core>=0.3.3", "pybind11>=2.13"]
 build-backend = "scikit_build_core.build"
 
 
@@ -15,7 +15,7 @@ authors = [
 requires-python = ">=3.8"
 license = { text = "GPLv2+" }
 
-dependencies = ["psutil", "numpy>=1.18"]
+dependencies = ["numpy>=1.18"]
 
 [project.optional-dependencies]
 test = ["pytest"]
@@ -29,7 +29,7 @@ Issues = "https://github.com/RUrlus/diptest/issues"
 wheel.expand-macos-universal-tags = true
 sdist.include = [
   "src/diptest",
-  "src/diptest_core",
+  "src/diptest-core",
   "src/external",
   "CMakeLists.txt",
 ]
@@ -58,7 +58,7 @@ test-extras = ["test"]
 
 archs = ["auto64"]
 skip = ["*-win32", "*-manylinux_i686", "*-musllinux_x86_64"]
-build = ["cp38-*", "cp39-*", "cp310-*", "cp311-*", "cp312-*", "cp313-*", "cp314-*"]
+build = ["cp39-*", "cp310-*", "cp311-*", "cp312-*", "cp313-*", "cp314-*", "cp314t-*", "cp315-*", "cp315t-*"]
 
 # make sure to build generic wheels
 environment = { CMAKE_ARGS = "-DDIPTEST_ENABLE_ARCH_FLAGS=OFF" }

src/diptest-core/src/bindings.cpp

@@ -11,7 +11,7 @@
 namespace diptest {
 namespace bindings {
 
-PYBIND11_MODULE(_diptest_core, m) {
+PYBIND11_MODULE(_diptest_core, m, py::mod_gil_not_used()) {
     bind_diptest(m);
     bind_diptest_full(m);
     bind_diptest_pval(m);

src/diptest/diptest.py

@@ -1,18 +1,20 @@
 from __future__ import annotations
 
+import os
 import warnings
 from typing import TYPE_CHECKING
 
 import numpy as np
-import psutil
 
 from diptest.consts import Consts
 from diptest.lib import _diptest_core as _diptest
 
 if TYPE_CHECKING:
     from typing import Any
 
-_N_CORES = psutil.cpu_count(logical=False)
+# ``process_cpu_count`` respects the CPU affinity mask but is only available
+# on Python 3.13+
+_N_CORES = (getattr(os, "process_cpu_count", None) or os.cpu_count)() or 1
 _N_CORES_MIN1 = _N_CORES - 1
 
 _DEFAULT_N_THREADS = min(_N_CORES_MIN1, 4) if _diptest._has_openmp_support else 1