API: bump minimum supported version of Python

In accordance with our policy, the minimum supported Python for the next
release will be Python 3.11.

Co-authored-by: David Stansby <dstansby@gmail.com>

Author: tacaswell

.github/workflows/cibuildwheel.yml

@@ -47,7 +47,7 @@ jobs:
       - uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55  # v5.5.0
         name: Install Python
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       # Something changed somewhere that prevents the downloaded-at-build-time
       # licenses from being included in built wheels, so pre-download them so
@@ -163,22 +163,17 @@ jobs:
           CIBW_BUILD: "cp311-*"
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
-      - name: Build wheels for CPython 3.10
-        uses: pypa/cibuildwheel@d04cacbc9866d432033b1d09142936e6a0e2121a  # v2.23.2
-        with:
-          package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
-        env:
-          CIBW_BUILD: "cp310-*"
-          CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
       - name: Build wheels for PyPy
         uses: pypa/cibuildwheel@d04cacbc9866d432033b1d09142936e6a0e2121a  # v2.23.2
         with:
           package-dir: dist/${{ needs.build_sdist.outputs.SDIST_NAME }}
         env:
-          CIBW_BUILD: "pp310-*"
+          CIBW_BUILD: "pp311-*"
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
           CIBW_ENABLE: pypy
+          # No wheels available for Pillow with pp311 yet.
+          CIBW_TEST_SKIP: "pp311*"
         if: matrix.cibw_archs != 'aarch64' && matrix.os != 'windows-latest'
 
       - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4.6.2

.github/workflows/mypy-stubtest.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Python 3
         uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55  # v5.5.0
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Set up reviewdog
         uses: reviewdog/action-setup@e04ffabe3898a0af8d0fb1af00c188831c4b5893  # v1.3.9
@@ -33,7 +33,7 @@ jobs:
         run: |
           set -o pipefail
           tox -e stubtest | \
-              sed -e "s!.tox/stubtest/lib/python3.10/site-packages!lib!g" | \
+              sed -e "s!.tox/stubtest/lib/python3.11/site-packages!lib!g" | \
               reviewdog \
                 -efm '%Eerror: %m' \
                 -efm '%CStub: in file %f:%l' \

.github/workflows/reviewdog.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Python 3
         uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55  # v5.5.0
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Install ruff
         run: pip3 install ruff
@@ -48,7 +48,7 @@ jobs:
       - name: Set up Python 3
         uses: actions/setup-python@8d9ed9ac5c53483de85588cdf95a591a75ab9f55  # v5.5.0
         with:
-          python-version: '3.10'
+          python-version: '3.11'
 
       - name: Install mypy
         run: pip3 install -r requirements/testing/mypy.txt -r requirements/testing/all.txt

.github/workflows/tests.yml

@@ -67,7 +67,7 @@ jobs:
             python-version: '3.12'
           - os: macos-13  # This runner is on Intel chips.
             # merge numpy and pandas install in nighties test when this runner is dropped
-            python-version: '3.10'
+            python-version: '3.11'
           - os: macos-14  # This runner is on M1 (arm64) chips.
             python-version: '3.12'
             # https://github.com/matplotlib/matplotlib/issues/29732

azure-pipelines.yml

@@ -49,11 +49,8 @@ stages:
       - job: Pytest
         strategy:
           matrix:
-            Windows_py310:
-              vmImage: 'windows-2019'  # keep one job pinned to the oldest image
-              python.version: '3.10'
             Windows_py311:
-              vmImage: 'windows-latest'
+              vmImage: 'windows-2019'  # keep one job pinned to the oldest image
               python.version: '3.11'
             Windows_py312:
               vmImage: 'windows-latest'

doc/devel/min_dep_policy.rst

@@ -115,6 +115,7 @@ specification of the dependencies.
 ==========  ========  ======
 Matplotlib  Python    NumPy
 ==========  ========  ======
+3.11        3.11      1.23.0
 `3.10`_     3.10      1.23.0
 `3.9`_      3.9       1.23.0
 `3.8`_      3.9       1.21.0

doc/install/dependencies.rst

@@ -20,7 +20,7 @@ When installing through a package manager like ``pip`` or ``conda``, the
 mandatory dependencies are automatically installed. This list is mainly for
 reference.
 
-* `Python <https://www.python.org/downloads/>`_ (>= 3.10)
+* `Python <https://www.python.org/downloads/>`_ (>= 3.11)
 * `contourpy <https://pypi.org/project/contourpy/>`_ (>= 1.0.1)
 * `cycler <https://matplotlib.org/cycler/>`_ (>= 0.10.0)
 * `dateutil <https://pypi.org/project/python-dateutil/>`_ (>= 2.7)

environment.yml

@@ -26,7 +26,7 @@ dependencies:
   - pygobject
   - pyparsing>=3
   - pyqt
-  - python>=3.10
+  - python>=3.11
   - python-dateutil>=2.1
   - setuptools_scm
   - wxpython

pyproject.toml

@@ -16,7 +16,6 @@ classifiers=[
     "License :: OSI Approved :: Python Software Foundation License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
@@ -41,7 +40,7 @@ dependencies = [
     "pyparsing >= 3",
     "python-dateutil >= 2.7",
 ]
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 
 [project.optional-dependencies]
 # Should be a copy of the build dependencies below.
@@ -105,7 +104,7 @@ exclude = [
     "*.ipynb"
 ]
 line-length = 88
-target-version = "py310"
+target-version = "py311"
 
 [tool.ruff.lint]
 ignore = [

requirements/testing/extra.txt

@@ -1,4 +1,4 @@
-# Extra pip requirements for the Python 3.10+ builds
+# Extra pip requirements for the Python 3.11+ builds
 
 --prefer-binary
 ipykernel