MNT Set Python 3.11 as the minimum supported version

.github/workflows/test.yml

@@ -73,16 +73,16 @@ jobs:
             PACKAGER: "conda"
             INSTALL_OPENCV: "true"
           # Windows env with numpy, scipy installed through pip
-          - name: py310_pip
+          - name: py311_pip
             os: windows-latest
-            PYTHON_VERSION: "3.10"
+            PYTHON_VERSION: "3.11"
             PACKAGER: "pip"
             INSTALL_OPENCV: "true"
 
           # MacOS env with OpenMP installed through homebrew
-          - name: py310_conda_homebrew_libomp
+          - name: py311_conda_homebrew_libomp
             os: macos-latest
-            PYTHON_VERSION: "3.10"
+            PYTHON_VERSION: "3.11"
             PACKAGER: "conda"
             BLAS: "openblas"
             CC_OUTER_LOOP: "clang"
@@ -106,20 +106,19 @@ jobs:
             INSTALL_BLAS: "flexiblas"
             PLATFORM_SPECIFIC_PACKAGES: "llvm-openmp"
 
-          # Linux environments to test that packages that comes with Ubuntu 22.04
-          # are correctly handled.
-          - name: py310_ubuntu_atlas_gcc_gcc
-            os: ubuntu-22.04
-            PYTHON_VERSION: "3.10"
+          # Test distro-provided SciPy and BLAS with Ubuntu 24.04's system Python.
+          - name: py312_ubuntu_atlas_gcc_gcc
+            os: ubuntu-24.04
+            PYTHON_VERSION: "3.12"
             PACKAGER: "ubuntu"
             APT_BLAS: "libatlas3-base libatlas-base-dev"
             CC_OUTER_LOOP: "gcc"
             CC_INNER_LOOP: "gcc"
-          - name: py310_ubuntu_openblas_gcc_gcc
-            os: ubuntu-22.04
-            PYTHON_VERSION: "3.10"
+          - name: py312_ubuntu_openblas_gcc_gcc
+            os: ubuntu-24.04
+            PYTHON_VERSION: "3.12"
             PACKAGER: "ubuntu"
-            APT_BLAS: "libopenblas-base libopenblas-dev"
+            APT_BLAS: "libopenblas0-pthread libopenblas-dev"
             CC_OUTER_LOOP: "gcc"
             CC_INNER_LOOP: "gcc"
 
@@ -132,11 +131,11 @@ jobs:
             CC_INNER_LOOP: "gcc"
             INSTALL_OPENCV: "true"
 
-          # Linux + Python 3.10 and homogeneous runtime nesting.
-          - name: py310_conda_openblas_clang_clang
+          # Linux + Python 3.11 and homogeneous runtime nesting.
+          - name: py311_conda_openblas_clang_clang
             os: ubuntu-latest
             PACKAGER: "conda"
-            PYTHON_VERSION: "3.10"
+            PYTHON_VERSION: "3.11"
             BLAS: "openblas"
             CC_OUTER_LOOP: "clang-18"
             CC_INNER_LOOP: "clang-18"

CHANGES.md

@@ -1,6 +1,9 @@
 3.9.0 (under development)
 =========================
 
+- Python 3.11 is now the minimum supported Python version.
+  https://github.com/joblib/threadpoolctl/issues/295
+
 3.8.0 (2026-11-05)
 ==================
 

continuous_integration/install.sh

@@ -111,12 +111,9 @@ elif [[ "$PACKAGER" == "pip-dev" ]]; then
     pip install --pre --upgrade --timeout=60 --extra-index $dev_anaconda_url numpy scipy
 
 elif [[ "$PACKAGER" == "ubuntu" ]]; then
-    # Remove the ubuntu toolchain PPA that seems to be invalid:
-    # https://github.com/scikit-learn/scikit-learn/pull/13934
-    sudo add-apt-repository --remove ppa:ubuntu-toolchain-r/test
     sudo apt-get update
     sudo apt-get install python3-scipy python3-virtualenv $APT_BLAS
-    python3 -m virtualenv --system-site-packages --python=python3 testenv
+    /usr/bin/python3 -m virtualenv --system-site-packages testenv
     source testenv/bin/activate
 
 elif [[ "$INSTALL_BLAS" == "blis" ]]; then

pyproject.toml

@@ -6,13 +6,12 @@ build-backend = "flit_core.buildapi"
 name = "threadpoolctl"
 authors = [{name = "Thomas Moreau", email = "thomas.moreau.2010@gmail.com"}]
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 license = "BSD-3-Clause"
 dynamic = ["version", "description"]
 classifiers = [
     "Intended Audience :: Developers",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",