Enable support of Python 3.15

.github/workflows/build-with-clang.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         numpy_version: ["'numpy>=2'"]
 
     env:
@@ -47,6 +47,8 @@ jobs:
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ matrix.python }}
+          # allow the 3.15 release candidate until 3.15 is final
+          allow-prereleases: true
           architecture: x64
 
       - name: Checkout repo

.github/workflows/build-with-standard-clang.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         numpy_version: ["'numpy>=2'"]
 
     env:
@@ -39,6 +39,8 @@ jobs:
         uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
         with:
           python-version: ${{ matrix.python }}
+          # allow the 3.15 release candidate until 3.15 is final
+          allow-prereleases: true
           architecture: x64
 
       - name: Checkout repo

.github/workflows/build_pip.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         use_pre: ["", "--pre"]
 
     steps:
@@ -30,7 +30,8 @@ jobs:
       - uses: conda-incubator/setup-miniconda@8ee1f361103df19b6f8c8655fd3967a8ecb162d5 # v4.0.1
         with:
           miniforge-version: latest
-          channels: conda-forge
+          # conda-forge/label/python_rc carries the 3.15 release candidate
+          channels: conda-forge,conda-forge/label/python_rc
           activate-environment: test
           python-version: ${{ matrix.python }}
 

.github/workflows/conda-package-cf.yml

@@ -32,6 +32,8 @@ jobs:
             numpy: "2.3"
           - python: "3.14"
             numpy: "2.3"
+          - python: "3.15"
+            numpy: "2.5"
 
     steps:
       - name: Cancel Previous Runs
@@ -68,7 +70,7 @@ jobs:
 
       - name: Build conda package with NumPy 2.x
         run: |
-          CHANNELS=(-c conda-forge --override-channels)
+          CHANNELS=(-c conda-forge -c conda-forge/label/python_rc --override-channels)
           VERSIONS=(--python "${{ matrix.python }}" --numpy "${{ matrix.numpy }}")
           TEST=(--no-test)
 
@@ -90,13 +92,13 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         numpy: ['numpy">=2"']
         experimental: [false]
         runner: [ubuntu-latest]
     continue-on-error: ${{ matrix.experimental }}
     env:
-      CHANNELS: -c conda-forge --override-channels
+      CHANNELS: -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -173,6 +175,8 @@ jobs:
             numpy: "2.3"
           - python: "3.14"
             numpy: "2.3"
+          - python: "3.15"
+            numpy: "2.5"
 
     steps:
       - name: Cancel Previous Runs
@@ -189,7 +193,7 @@ jobs:
         with:
           miniforge-version: latest
           activate-environment: build
-          channels: conda-forge
+          channels: conda-forge,conda-forge/label/python_rc
           python-version: ${{ matrix.python }}
 
       - name: Install conda-build
@@ -211,7 +215,7 @@ jobs:
 
       - name: Build conda package with NumPy 2.x
         run: |
-          conda build --no-test --python ${{ matrix.python }} --numpy ${{ matrix.numpy }} -c conda-forge --override-channels conda-recipe-cf
+          conda build --no-test --python ${{ matrix.python }} --numpy ${{ matrix.numpy }} -c conda-forge -c conda-forge/label/python_rc --override-channels conda-recipe-cf
 
       - name: Store conda paths as envs
         shell: bash -l {0}
@@ -233,14 +237,14 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         numpy: ['numpy">=2"']
         experimental: [false]
         runner: [windows-latest]
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
-      CHANNELS: -c conda-forge --override-channels
+      CHANNELS: -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -251,7 +255,7 @@ jobs:
       - uses: conda-incubator/setup-miniconda@8ee1f361103df19b6f8c8655fd3967a8ecb162d5 # v4.0.1
         with:
           miniforge-version: latest
-          channels: conda-forge
+          channels: conda-forge,conda-forge/label/python_rc
           activate-environment: ${{ env.TEST_ENV_NAME }}
           python-version: ${{ matrix.python }}
 

.github/workflows/conda-package.yml

@@ -33,6 +33,8 @@ jobs:
             numpy: "2.3"
           - python: "3.14"
             numpy: "2.3"
+          - python: "3.15"
+            numpy: "2.5"
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@d07a454dad7609a92316b57b23c9ccfd4f59af66 # 0.13.1
@@ -85,7 +87,7 @@ jobs:
 
       - name: Build conda package
         run: |
-          CHANNELS=(-c https://software.repos.intel.com/python/conda -c conda-forge --override-channels)
+          CHANNELS=(-c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels)
           VERSIONS=(--python "${{ matrix.python }}" --numpy "${{ matrix.numpy }}")
           TEST=(--no-test)
 
@@ -113,13 +115,13 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         numpy: ['numpy">=2"']
         experimental: [false]
         runner: [ubuntu-latest]
     continue-on-error: ${{ matrix.experimental }}
     env:
-      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
+      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -217,6 +219,8 @@ jobs:
             numpy: "2.3"
           - python: "3.14"
             numpy: "2.3"
+          - python: "3.15"
+            numpy: "2.5"
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@d07a454dad7609a92316b57b23c9ccfd4f59af66 # 0.13.1
@@ -233,7 +237,7 @@ jobs:
           auto-update-conda: true
           miniforge-version: latest
           activate-environment: build
-          channels: conda-forge
+          channels: conda-forge,conda-forge/label/python_rc
           python-version: ${{ matrix.python }}
           conda-build-version: ${{ env.CONDA_BUILD_VERSION }}
 
@@ -265,7 +269,7 @@ jobs:
 
       - name: Build conda package
         run: |
-          conda build --no-test --python ${{ matrix.python }} --numpy ${{ matrix.numpy }} -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels conda-recipe
+          conda build --no-test --python ${{ matrix.python }} --numpy ${{ matrix.numpy }} -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels conda-recipe
 
       - name: Upload artifact
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -288,14 +292,14 @@ jobs:
 
     strategy:
       matrix:
-        python: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         numpy: ['numpy">=2"']
         experimental: [false]
         runner: [windows-latest]
     continue-on-error: ${{ matrix.experimental }}
     env:
       workdir: '${{ github.workspace }}'
-      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge --override-channels
+      CHANNELS: -c https://software.repos.intel.com/python/conda -c conda-forge -c conda-forge/label/python_rc --override-channels
 
     steps:
       - name: Download artifact
@@ -307,7 +311,7 @@ jobs:
         with:
           auto-update-conda: true
           miniforge-version: latest
-          channels: conda-forge
+          channels: conda-forge,conda-forge/label/python_rc
           activate-environment: ${{ env.TEST_ENV_NAME }}
           python-version: ${{ matrix.python }}
 

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [dev] - YYYY-MM-DD
 
 ### Added
+* Enabled support of Python 3.15 [gh-378](https://github.com/IntelPython/mkl_fft/pull/378)
 
 ### Changed
 * Multi-iterator constructors now return a status corresponding to allocation success or failure, and raise `MemoryError` instead of `ValueError` [gh-373](https://github.com/IntelPython/mkl_fft/pull/373)

pyproject.toml

@@ -48,6 +48,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: Implementation :: CPython",
   "Topic :: Software Development",
   "Topic :: Scientific/Engineering",
@@ -62,7 +63,7 @@ keywords = ["DFTI", "FFT", "Fourier", "MKL"]
 license = "BSD-3-Clause"
 name = "mkl_fft"
 readme = {file = "README.md", content-type = "text/markdown"}
-requires-python = ">=3.10,<3.15"
+requires-python = ">=3.10,<3.16"
 
 [project.optional-dependencies]
 benchmark = ["asv>=0.6", "psutil", "scipy>=1.10"]