Drop support for Python 3.9 (#9119)

Co-authored-by: Andrew Murray <radarhere@users.noreply.github.com>
Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>

.ci/install.sh

@@ -13,24 +13,21 @@ aptget_update()
         return 1
     fi
 }
-if [[ $(uname) != CYGWIN* ]]; then
-    aptget_update || aptget_update retry || aptget_update retry
-fi
+aptget_update || aptget_update retry || aptget_update retry
 
 set -e
 
-if [[ $(uname) != CYGWIN* ]]; then
-    sudo apt-get -qq install libfreetype6-dev liblcms2-dev libtiff-dev python3-tk\
-                             ghostscript libjpeg-turbo8-dev libopenjp2-7-dev\
-                             cmake meson imagemagick libharfbuzz-dev libfribidi-dev\
-                             sway wl-clipboard libopenblas-dev nasm
-fi
+sudo apt-get -qq install libfreetype6-dev liblcms2-dev libtiff-dev python3-tk\
+                         ghostscript libjpeg-turbo8-dev libopenjp2-7-dev\
+                         cmake meson imagemagick libharfbuzz-dev libfribidi-dev\
+                         sway wl-clipboard libopenblas-dev nasm
 
 python3 -m pip install --upgrade pip
 python3 -m pip install --upgrade wheel
 python3 -m pip install coverage
 python3 -m pip install defusedxml
 python3 -m pip install ipython
+python3 -m pip install numpy
 python3 -m pip install olefile
 python3 -m pip install -U pytest
 python3 -m pip install -U pytest-cov
@@ -40,36 +37,24 @@ python3 -m pip install pyroma
 # fails on beta 3.14 and PyPy
 python3 -m pip install --only-binary=:all: pyarrow || true
 
-if [[ $(uname) != CYGWIN* ]]; then
-    python3 -m pip install numpy
-
-    # PyQt6 doesn't support PyPy3
-    if [[ $GHA_PYTHON_VERSION == 3.* ]]; then
-        sudo apt-get -qq install libegl1 libxcb-cursor0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-shape0 libxkbcommon-x11-0
-        # TODO Update condition when pyqt6 supports free-threading
-        if ! [[ "$PYTHON_GIL" == "0" ]]; then python3 -m pip install pyqt6 ; fi
-    fi
-
-    # Pyroma uses non-isolated build and fails with old setuptools
-    if [[ $GHA_PYTHON_VERSION == 3.9 ]]; then
-        # To match pyproject.toml
-        python3 -m pip install "setuptools>=77"
-    fi
-
-    # webp
-    pushd depends && ./install_webp.sh && popd
-
-    # libimagequant
-    pushd depends && ./install_imagequant.sh && popd
-
-    # raqm
-    pushd depends && ./install_raqm.sh && popd
-
-    # libavif
-    pushd depends && ./install_libavif.sh && popd
-
-    # extra test images
-    pushd depends && ./install_extra_test_images.sh && popd
-else
-    cd depends && ./install_extra_test_images.sh && cd ..
+# PyQt6 doesn't support PyPy3
+if [[ $GHA_PYTHON_VERSION == 3.* ]]; then
+    sudo apt-get -qq install libegl1 libxcb-cursor0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-shape0 libxkbcommon-x11-0
+    # TODO Update condition when pyqt6 supports free-threading
+    if ! [[ "$PYTHON_GIL" == "0" ]]; then python3 -m pip install pyqt6 ; fi
 fi
+
+# webp
+pushd depends && ./install_webp.sh && popd
+
+# libimagequant
+pushd depends && ./install_imagequant.sh && popd
+
+# raqm
+pushd depends && ./install_raqm.sh && popd
+
+# libavif
+pushd depends && ./install_libavif.sh && popd
+
+# extra test images
+pushd depends && ./install_extra_test_images.sh && popd

.github/mergify.yml

@@ -8,7 +8,6 @@ pull_request_rules:
       - status-success=Docker Test Successful
       - status-success=Windows Test Successful
       - status-success=MinGW
-      - status-success=Cygwin Test Successful
     actions:
       merge:
         method: merge

.github/workflows/test-cygwin.yml

@@ -1,150 +0,0 @@
-name: Test Cygwin
-
-on:
-  push:
-    branches:
-      - "**"
-    paths-ignore:
-      - ".github/workflows/docs.yml"
-      - ".github/workflows/wheels*"
-      - ".gitmodules"
-      - "docs/**"
-      - "wheels/**"
-  pull_request:
-    paths-ignore:
-      - ".github/workflows/docs.yml"
-      - ".github/workflows/wheels*"
-      - ".gitmodules"
-      - "docs/**"
-      - "wheels/**"
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-env:
-  COVERAGE_CORE: sysmon
-
-jobs:
-  build:
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-minor-version: [9]
-
-    timeout-minutes: 40
-
-    name: Python 3.${{ matrix.python-minor-version }}
-
-    steps:
-      - name: Fix line endings
-        run: |
-          git config --global core.autocrlf input
-
-      - name: Checkout Pillow
-        uses: actions/checkout@v4
-        with:
-          persist-credentials: false
-
-      - name: Install Cygwin
-        uses: cygwin/cygwin-install-action@v6
-        with:
-          packages: >
-            gcc-g++
-            ghostscript
-            git
-            ImageMagick
-            jpeg
-            libfreetype-devel
-            libimagequant-devel
-            libjpeg-devel
-            liblapack-devel
-            liblcms2-devel
-            libopenjp2-devel
-            libraqm-devel
-            libtiff-devel
-            libwebp-devel
-            libxcb-devel
-            libxcb-xinerama0
-            make
-            netpbm
-            perl
-            python3${{ matrix.python-minor-version }}-cython
-            python3${{ matrix.python-minor-version }}-devel
-            python3${{ matrix.python-minor-version }}-ipython
-            python3${{ matrix.python-minor-version }}-numpy
-            python3${{ matrix.python-minor-version }}-sip
-            python3${{ matrix.python-minor-version }}-tkinter
-            wget
-            xorg-server-extra
-            zlib-devel
-
-      - name: Add Lapack to PATH
-        uses: egor-tensin/cleanup-path@v4
-        with:
-          dirs: 'C:\cygwin\bin;C:\cygwin\lib\lapack'
-
-      - name: pip cache
-        uses: actions/cache@v4
-        with:
-          path: 'C:\cygwin\home\runneradmin\.cache\pip'
-          key: ${{ runner.os }}-cygwin-pip3.${{ matrix.python-minor-version }}-${{ hashFiles('.ci/install.sh') }}
-          restore-keys: |
-            ${{ runner.os }}-cygwin-pip3.${{ matrix.python-minor-version }}-
-
-      - name: Build system information
-        run: |
-          dash.exe -c "python3 .github/workflows/system-info.py"
-
-      - name: Install dependencies
-        run: |
-          bash.exe .ci/install.sh
-
-      - name: Build
-        shell: bash.exe -eo pipefail -o igncr "{0}"
-        run: |
-          .ci/build.sh
-
-      - name: Test
-        run: |
-          bash.exe xvfb-run -s '-screen 0 1024x768x24' .ci/test.sh
-
-      - name: Prepare to upload errors
-        if: failure()
-        run: |
-          dash.exe -c "mkdir -p Tests/errors"
-
-      - name: Upload errors
-        uses: actions/upload-artifact@v4
-        if: failure()
-        with:
-          name: errors
-          path: Tests/errors
-
-      - name: After success
-        run: |
-          bash.exe .ci/after_success.sh
-          rm C:\cygwin\bin\bash.EXE
-
-      - name: Upload coverage
-        uses: codecov/codecov-action@v5
-        with:
-          files: ./coverage.xml
-          flags: GHA_Cygwin
-          name: Cygwin Python 3.${{ matrix.python-minor-version }}
-          token: ${{ secrets.CODECOV_ORG_TOKEN }}
-
-  success:
-    permissions:
-      contents: none
-    needs: build
-    runs-on: ubuntu-latest
-    name: Cygwin Test Successful
-    steps:
-      - name: Success
-        run: echo Cygwin Test Successful

.github/workflows/test-windows.yml

@@ -35,11 +35,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["pypy3.11", "3.10", "3.11", "3.12", ">=3.13.5", "3.14"]
+        python-version: ["pypy3.11", "3.11", "3.12", "3.13", "3.14"]
         architecture: ["x64"]
         include:
             # Test the oldest Python on 32-bit
-            - { python-version: "3.9", architecture: "x86" }
+            - { python-version: "3.10", architecture: "x86" }
 
     timeout-minutes: 45
 

.github/workflows/test.yml

@@ -49,18 +49,17 @@ jobs:
           "3.12",
           "3.11",
           "3.10",
-          "3.9",
         ]
         include:
-        - { python-version: "3.11", PYTHONOPTIMIZE: 1, REVERSE: "--reverse" }
-        - { python-version: "3.10", PYTHONOPTIMIZE: 2 }
+        - { python-version: "3.12", PYTHONOPTIMIZE: 1, REVERSE: "--reverse" }
+        - { python-version: "3.11", PYTHONOPTIMIZE: 2 }
         # Free-threaded
         - { python-version: "3.14t", disable-gil: true }
         - { python-version: "3.13t", disable-gil: true }
-        # M1 only available for 3.10+
-        - { os: "macos-13", python-version: "3.9" }
+        # Intel
+        - { os: "macos-13", python-version: "3.10" }
         exclude:
-        - { os: "macos-latest", python-version: "3.9" }
+        - { os: "macos-latest", python-version: "3.10" }
 
     runs-on: ${{ matrix.os }}
     name: ${{ matrix.os }} Python ${{ matrix.python-version }}

README.md

@@ -36,9 +36,6 @@ As of 2019, Pillow development is
             <a href="https://github.com/python-pillow/Pillow/actions/workflows/test-mingw.yml"><img
                 alt="GitHub Actions build status (Test MinGW)"
                 src="https://github.com/python-pillow/Pillow/workflows/Test%20MinGW/badge.svg"></a>
-            <a href="https://github.com/python-pillow/Pillow/actions/workflows/test-cygwin.yml"><img
-                alt="GitHub Actions build status (Test Cygwin)"
-                src="https://github.com/python-pillow/Pillow/workflows/Test%20Cygwin/badge.svg"></a>
             <a href="https://github.com/python-pillow/Pillow/actions/workflows/test-docker.yml"><img
                 alt="GitHub Actions build status (Test Docker)"
                 src="https://github.com/python-pillow/Pillow/workflows/Test%20Docker/badge.svg"></a>

Tests/helper.py

@@ -10,17 +10,20 @@ import shutil
 import subprocess
 import sys
 import tempfile
-from collections.abc import Sequence
 from functools import lru_cache
 from io import BytesIO
-from pathlib import Path
-from typing import Any, Callable
 
 import pytest
 from packaging.version import parse as parse_version
 
 from PIL import Image, ImageFile, ImageMath, features
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable, Sequence
+    from pathlib import Path
+    from typing import Any
+
 logger = logging.getLogger(__name__)
 
 uploader = None

Tests/test_features.py

@@ -2,7 +2,6 @@ from __future__ import annotations
 
 import io
 import re
-from typing import Callable
 
 import pytest
 
@@ -10,6 +9,10 @@ from PIL import features
 
 from .helper import skip_unless_feature
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 
 def test_check() -> None:
     # Check the correctness of the convenience function

Tests/test_format_hsv.py

@@ -2,12 +2,15 @@ from __future__ import annotations
 
 import colorsys
 import itertools
-from typing import Callable
 
 from PIL import Image
 
 from .helper import assert_image_similar, hopper
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 
 def int_to_float(i: int) -> float:
     return i / 255

Tests/test_image_transform.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import math
-from typing import Callable
 
 import pytest
 
@@ -9,6 +8,10 @@ from PIL import Image, ImageTransform
 
 from .helper import assert_image_equal, assert_image_similar, hopper
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 
 class TestImageTransform:
     def test_sanity(self) -> None:

Tests/test_imagechops.py

@@ -1,11 +1,13 @@
 from __future__ import annotations
 
-from typing import Callable
-
 from PIL import Image, ImageChops
 
 from .helper import assert_image_equal, hopper
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 BLACK = (0, 0, 0)
 BROWN = (127, 64, 0)
 CYAN = (0, 255, 255)

Tests/test_imagecms.py

@@ -211,9 +211,10 @@ def test_exceptions() -> None:
         ImageCms.getProfileName(None)  # type: ignore[arg-type]
     skip_missing()
 
-    # Python <= 3.9: "an integer is required (got type NoneType)"
-    # Python > 3.9: "'NoneType' object cannot be interpreted as an integer"
-    with pytest.raises(ImageCms.PyCMSError, match="integer"):
+    with pytest.raises(
+        ImageCms.PyCMSError,
+        match="'NoneType' object cannot be interpreted as an integer",
+    ):
         ImageCms.isIntentSupported(SRGB, None, None)  # type: ignore[arg-type]
 
 

Tests/test_imagedraw.py

@@ -1,13 +1,10 @@
 from __future__ import annotations
 
 import os.path
-from collections.abc import Sequence
-from typing import Callable
 
 import pytest
 
 from PIL import Image, ImageColor, ImageDraw, ImageFont, features
-from PIL._typing import Coords
 
 from .helper import (
     assert_image_equal,
@@ -17,6 +14,12 @@ from .helper import (
     skip_unless_feature,
 )
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable, Sequence
+
+    from PIL._typing import Coords
+
 BLACK = (0, 0, 0)
 WHITE = (255, 255, 255)
 GRAY = (190, 190, 190)

Tests/test_qt_image_qapplication.py

@@ -1,8 +1,5 @@
 from __future__ import annotations
 
-from pathlib import Path
-from typing import Union
-
 import pytest
 
 from PIL import Image, ImageQt
@@ -11,18 +8,8 @@ from .helper import assert_image_equal_tofile, assert_image_similar, hopper
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
-    import PyQt6
-    import PySide6
+    from pathlib import Path
 
-    QApplication = Union[PyQt6.QtWidgets.QApplication, PySide6.QtWidgets.QApplication]
-    QHBoxLayout = Union[PyQt6.QtWidgets.QHBoxLayout, PySide6.QtWidgets.QHBoxLayout]
-    QImage = Union[PyQt6.QtGui.QImage, PySide6.QtGui.QImage]
-    QLabel = Union[PyQt6.QtWidgets.QLabel, PySide6.QtWidgets.QLabel]
-    QPainter = Union[PyQt6.QtGui.QPainter, PySide6.QtGui.QPainter]
-    QPixmap = Union[PyQt6.QtGui.QPixmap, PySide6.QtGui.QPixmap]
-    QPoint = Union[PyQt6.QtCore.QPoint, PySide6.QtCore.QPoint]
-    QRegion = Union[PyQt6.QtGui.QRegion, PySide6.QtGui.QRegion]
-    QWidget = Union[PyQt6.QtWidgets.QWidget, PySide6.QtWidgets.QWidget]
 
 if ImageQt.qt_is_installed:
     from PIL.ImageQt import QPixmap
@@ -32,11 +19,16 @@ if ImageQt.qt_is_installed:
         from PyQt6.QtGui import QImage, QPainter, QRegion
         from PyQt6.QtWidgets import QApplication, QHBoxLayout, QLabel, QWidget
     elif ImageQt.qt_version == "side6":
-        from PySide6.QtCore import QPoint
-        from PySide6.QtGui import QImage, QPainter, QRegion
-        from PySide6.QtWidgets import QApplication, QHBoxLayout, QLabel, QWidget
+        from PySide6.QtCore import QPoint  # type: ignore[assignment]
+        from PySide6.QtGui import QImage, QPainter, QRegion  # type: ignore[assignment]
+        from PySide6.QtWidgets import (  # type: ignore[assignment]
+            QApplication,
+            QHBoxLayout,
+            QLabel,
+            QWidget,
+        )
 
-    class Example(QWidget):  # type: ignore[misc]
+    class Example(QWidget):
         def __init__(self) -> None:
             super().__init__()
 
@@ -47,9 +39,9 @@ if ImageQt.qt_is_installed:
             pixmap1 = getattr(ImageQt.QPixmap, "fromImage")(qimage)
 
             # hbox
-            QHBoxLayout(self)  # type: ignore[operator]
+            QHBoxLayout(self)
 
-            lbl = QLabel(self)  # type: ignore[operator]
+            lbl = QLabel(self)
             # Segfault in the problem
             lbl.setPixmap(pixmap1.copy())
 
@@ -63,7 +55,7 @@ def roundtrip(expected: Image.Image) -> None:
 @pytest.mark.skipif(not ImageQt.qt_is_installed, reason="Qt bindings are not installed")
 def test_sanity(tmp_path: Path) -> None:
     # Segfault test
-    app: QApplication | None = QApplication([])  # type: ignore[operator]
+    app: QApplication | None = QApplication([])
     ex = Example()
     assert app  # Silence warning
     assert ex  # Silence warning
@@ -84,11 +76,11 @@ def test_sanity(tmp_path: Path) -> None:
         imageqt = ImageQt.ImageQt(im)
         data = getattr(QPixmap, "fromImage")(imageqt)
         qt_format = getattr(QImage, "Format") if ImageQt.qt_version == "6" else QImage
-        qimage = QImage(128, 128, getattr(qt_format, "Format_ARGB32"))  # type: ignore[operator]
-        painter = QPainter(qimage)  # type: ignore[operator]
-        image_label = QLabel()  # type: ignore[operator]
+        qimage = QImage(128, 128, getattr(qt_format, "Format_ARGB32"))
+        painter = QPainter(qimage)
+        image_label = QLabel()
         image_label.setPixmap(data)
-        image_label.render(painter, QPoint(0, 0), QRegion(0, 0, 128, 128))  # type: ignore[operator]
+        image_label.render(painter, QPoint(0, 0), QRegion(0, 0, 128, 128))
         painter.end()
         rendered_tempfile = str(tmp_path / f"temp_rendered_{mode}.png")
         qimage.save(rendered_tempfile)

Tests/test_qt_image_toqimage.py

@@ -1,13 +1,15 @@
 from __future__ import annotations
 
-from pathlib import Path
-
 import pytest
 
 from PIL import ImageQt
 
 from .helper import assert_image_equal, assert_image_equal_tofile, hopper
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+
 pytestmark = pytest.mark.skipif(
     not ImageQt.qt_is_installed, reason="Qt bindings are not installed"
 )
@@ -21,7 +23,7 @@ def test_sanity(mode: str, tmp_path: Path) -> None:
     src = hopper(mode)
     data = ImageQt.toqimage(src)
 
-    assert isinstance(data, QImage)  # type: ignore[arg-type, misc]
+    assert isinstance(data, QImage)
     assert not data.isNull()
 
     # reload directly from the qimage

Tests/test_shell_injection.py

@@ -2,8 +2,6 @@ from __future__ import annotations
 
 import shutil
 from io import BytesIO
-from pathlib import Path
-from typing import IO, Callable
 
 import pytest
 
@@ -11,6 +9,12 @@ from PIL import GifImagePlugin, Image, JpegImagePlugin
 
 from .helper import djpeg_available, is_win32, netpbm_available
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+    from pathlib import Path
+    from typing import IO
+
 TEST_JPG = "Tests/images/hopper.jpg"
 TEST_GIF = "Tests/images/hopper.gif"
 

checks/check_imaging_leaks.py

@@ -1,7 +1,8 @@
 #!/usr/bin/env python3
 from __future__ import annotations
 
-from typing import Any, Callable
+from collections.abc import Callable
+from typing import Any
 
 import pytest
 

docs/index.rst

@@ -29,10 +29,6 @@ Pillow for enterprise is available via the Tidelift Subscription. `Learn more <h
    :target: https://github.com/python-pillow/Pillow/actions/workflows/test-mingw.yml
    :alt: GitHub Actions build status (Test MinGW)
 
-.. image:: https://github.com/python-pillow/Pillow/workflows/Test%20Cygwin/badge.svg
-   :target: https://github.com/python-pillow/Pillow/actions/workflows/test-cygwin.yml
-   :alt: GitHub Actions build status (Test Cygwin)
-
 .. image:: https://github.com/python-pillow/Pillow/workflows/Wheels/badge.svg
    :target: https://github.com/python-pillow/Pillow/actions/workflows/wheels.yml
    :alt: GitHub Actions build status (Wheels)

docs/installation/platform-support.rst

@@ -19,13 +19,13 @@ These platforms are built and tested for every change.
 +==================================+============================+=====================+
 | Alpine                           | 3.12                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| Amazon Linux 2                   | 3.9                        | x86-64              |
+| Amazon Linux 2                   | 3.10                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| Amazon Linux 2023                | 3.9                        | x86-64              |
+| Amazon Linux 2023                | 3.11                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
 | Arch                             | 3.13                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| CentOS Stream 9                  | 3.9                        | x86-64              |
+| CentOS Stream 9                  | 3.10                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
 | CentOS Stream 10                 | 3.12                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
@@ -37,27 +37,25 @@ These platforms are built and tested for every change.
 +----------------------------------+----------------------------+---------------------+
 | Gentoo                           | 3.12                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| macOS 13 Ventura                 | 3.9                        | x86-64              |
+| macOS 13 Ventura                 | 3.10                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| macOS 14 Sonoma                  | 3.10, 3.11, 3.12, 3.13,    | arm64               |
-|                                  | 3.14, PyPy3                |                     |
+| macOS 14 Sonoma                  | 3.11, 3.12, 3.13, 3.14     | arm64               |
+|                                  | PyPy3                      |                     |
 +----------------------------------+----------------------------+---------------------+
 | Ubuntu Linux 22.04 LTS (Jammy)   | 3.10                       | x86-64              |
 +----------------------------------+----------------------------+---------------------+
-| Ubuntu Linux 24.04 LTS (Noble)   | 3.9, 3.10, 3.11,           | x86-64              |
-|                                  | 3.12, 3.13, 3.14, PyPy3    |                     |
+| Ubuntu Linux 24.04 LTS (Noble)   | 3.10, 3.11, 3.12, 3.13,    | x86-64              |
+|                                  | 3.14, PyPy3                |                     |
 |                                  +----------------------------+---------------------+
 |                                  | 3.12                       | arm64v8, ppc64le,   |
 |                                  |                            | s390x               |
 +----------------------------------+----------------------------+---------------------+
-| Windows Server 2022              | 3.9                        | x86                 |
+| Windows Server 2022              | 3.10                       | x86                 |
 |                                  +----------------------------+---------------------+
-|                                  | 3.10, 3.11, 3.12, 3.13,    | x86-64              |
-|                                  | 3.14, PyPy3                |                     |
+|                                  | 3.11, 3.12, 3.13, 3.14,    | x86-64              |
+|                                  | PyPy3                      |                     |
 |                                  +----------------------------+---------------------+
 |                                  | 3.12 (MinGW)               | x86-64              |
-|                                  +----------------------------+---------------------+
-|                                  | 3.9 (Cygwin)               | x86-64              |
 +----------------------------------+----------------------------+---------------------+
 
 

docs/reference/internal_modules.rst

@@ -53,11 +53,6 @@ on some Python versions.
 
     An object that supports the read method.
 
-.. py:data:: TypeGuard
-    :value: typing.TypeGuard
-
-    See :py:obj:`typing.TypeGuard`.
-
 :mod:`~PIL._util` module
 ------------------------
 

docs/releasenotes/12.0.0.rst

@@ -17,6 +17,12 @@ TODO
 Backwards incompatible changes
 ==============================
 
+Python 3.9
+^^^^^^^^^^
+
+Pillow has dropped support for Python 3.9,
+which reached end-of-life in October 2025.
+
 ImageFile.raise_oserror
 ^^^^^^^^^^^^^^^^^^^^^^^
 

pyproject.toml

@@ -20,11 +20,10 @@ license-files = [ "LICENSE" ]
 authors = [
   { name = "Jeffrey A. Clark", email = "aclark@aclark.net" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
   "Development Status :: 6 - Mature",
   "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",
@@ -76,9 +75,6 @@ optional-dependencies.tests = [
   "trove-classifiers>=2024.10.12",
 ]
 
-optional-dependencies.typing = [
-  "typing-extensions; python_version<'3.10'",
-]
 optional-dependencies.xmp = [
   "defusedxml",
 ]
@@ -189,8 +185,8 @@ lint.ignore = [
   "PT011",  # pytest-raises-too-broad
   "PT012",  # pytest-raises-with-multiple-statements
   "PT017",  # pytest-assert-in-except
-  "PYI026", # flake8-pyi: typing.TypeAlias added in Python 3.10
   "PYI034", # flake8-pyi: typing.Self added in Python 3.11
+  "UP038",  # pyupgrade: deprecated rule
 ]
 lint.per-file-ignores."Tests/oss-fuzz/fuzz_font.py" = [
   "I002",
@@ -216,7 +212,7 @@ testpaths = [
 ]
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 pretty = true
 disallow_any_generics = true
 enable_error_code = "ignore-without-code"

src/PIL/GifImagePlugin.py

@@ -31,7 +31,7 @@ import os
 import subprocess
 from enum import IntEnum
 from functools import cached_property
-from typing import IO, Any, Literal, NamedTuple, Union, cast
+from typing import Any, NamedTuple, cast
 
 from . import (
     Image,
@@ -49,6 +49,8 @@ from ._util import DeferredError
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
+    from typing import IO, Literal
+
     from . import _imaging
     from ._typing import Buffer
 
@@ -535,7 +537,7 @@ def _normalize_mode(im: Image.Image) -> Image.Image:
     return im.convert("L")
 
 
-_Palette = Union[bytes, bytearray, list[int], ImagePalette.ImagePalette]
+_Palette = bytes | bytearray | list[int] | ImagePalette.ImagePalette
 
 
 def _normalize_palette(

src/PIL/GimpGradientFile.py

@@ -21,10 +21,14 @@ See the GIMP distribution for more information.)
 from __future__ import annotations
 
 from math import log, pi, sin, sqrt
-from typing import IO, Callable
 
 from ._binary import o8
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+    from typing import IO
+
 EPSILON = 1e-10
 """"""  # Enable auto-doc for data member
 

src/PIL/ImageDraw.py

@@ -34,20 +34,23 @@ from __future__ import annotations
 import math
 import struct
 from collections.abc import Sequence
-from types import ModuleType
-from typing import Any, AnyStr, Callable, Union, cast
+from typing import cast
 
 from . import Image, ImageColor
-from ._typing import Coords
+
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+    from types import ModuleType
+    from typing import Any, AnyStr
+
+    from . import ImageDraw2, ImageFont
+    from ._typing import Coords
 
 # experimental access to the outline API
 Outline: Callable[[], Image.core._Outline] = Image.core.outline
 
-TYPE_CHECKING = False
-if TYPE_CHECKING:
-    from . import ImageDraw2, ImageFont
-
-_Ink = Union[float, tuple[int, ...], str]
+_Ink = float | tuple[int, ...] | str
 
 """
 A simple 2D drawing interface for PIL images.

src/PIL/ImageFilter.py

@@ -19,11 +19,14 @@ from __future__ import annotations
 import abc
 import functools
 from collections.abc import Sequence
-from types import ModuleType
-from typing import Any, Callable, cast
+from typing import cast
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
+    from collections.abc import Callable
+    from types import ModuleType
+    from typing import Any
+
     from . import _imaging
     from ._typing import NumpyArray
 

src/PIL/ImageMath.py

@@ -17,11 +17,15 @@
 from __future__ import annotations
 
 import builtins
-from types import CodeType
-from typing import Any, Callable
 
 from . import Image, _imagingmath
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+    from types import CodeType
+    from typing import Any
+
 
 class _Operand:
     """Wraps an image operand, providing standard operators"""

src/PIL/ImageQt.py

@@ -19,23 +19,18 @@ from __future__ import annotations
 
 import sys
 from io import BytesIO
-from typing import Any, Callable, Union
 
 from . import Image
 from ._util import is_path
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
-    import PyQt6
-    import PySide6
+    from collections.abc import Callable
+    from typing import Any
 
     from . import ImageFile
 
     QBuffer: type
-    QByteArray = Union[PyQt6.QtCore.QByteArray, PySide6.QtCore.QByteArray]
-    QIODevice = Union[PyQt6.QtCore.QIODevice, PySide6.QtCore.QIODevice]
-    QImage = Union[PyQt6.QtGui.QImage, PySide6.QtGui.QImage]
-    QPixmap = Union[PyQt6.QtGui.QPixmap, PySide6.QtGui.QPixmap]
 
 qt_version: str | None
 qt_versions = [
@@ -49,11 +44,15 @@ for version, qt_module in qt_versions:
     try:
         qRgba: Callable[[int, int, int, int], int]
         if qt_module == "PyQt6":
-            from PyQt6.QtCore import QBuffer, QIODevice
+            from PyQt6.QtCore import QBuffer, QByteArray, QIODevice
             from PyQt6.QtGui import QImage, QPixmap, qRgba
         elif qt_module == "PySide6":
-            from PySide6.QtCore import QBuffer, QIODevice
-            from PySide6.QtGui import QImage, QPixmap, qRgba
+            from PySide6.QtCore import (  # type: ignore[assignment]
+                QBuffer,
+                QByteArray,
+                QIODevice,
+            )
+            from PySide6.QtGui import QImage, QPixmap, qRgba  # type: ignore[assignment]
     except (ImportError, RuntimeError):
         continue
     qt_is_installed = True
@@ -183,7 +182,7 @@ def _toqclass_helper(im: Image.Image | str | QByteArray) -> dict[str, Any]:
 
 if qt_is_installed:
 
-    class ImageQt(QImage):  # type: ignore[misc]
+    class ImageQt(QImage):
         def __init__(self, im: Image.Image | str | QByteArray) -> None:
             """
             An PIL image wrapper for Qt.  This is a subclass of PyQt's QImage

src/PIL/ImageSequence.py

@@ -16,10 +16,12 @@
 ##
 from __future__ import annotations
 
-from typing import Callable
-
 from . import Image
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 
 class Iterator:
     """

src/PIL/PcfFontFile.py

@@ -18,7 +18,6 @@
 from __future__ import annotations
 
 import io
-from typing import BinaryIO, Callable
 
 from . import FontFile, Image
 from ._binary import i8
@@ -27,6 +26,11 @@ from ._binary import i16le as l16
 from ._binary import i32be as b32
 from ._binary import i32le as l32
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+    from typing import BinaryIO
+
 # --------------------------------------------------------------------
 # declarations
 

src/PIL/PdfParser.py

@@ -8,7 +8,15 @@ import os
 import re
 import time
 import zlib
-from typing import IO, Any, NamedTuple, Union
+from typing import Any, NamedTuple
+
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import IO
+
+    _DictBase = collections.UserDict[str | bytes, Any]
+else:
+    _DictBase = collections.UserDict
 
 
 # see 7.9.2.2 Text String Type on page 86 and D.3 PDFDocEncoding Character Set
@@ -251,13 +259,6 @@ class PdfArray(list[Any]):
         return b"[ " + b" ".join(pdf_repr(x) for x in self) + b" ]"
 
 
-TYPE_CHECKING = False
-if TYPE_CHECKING:
-    _DictBase = collections.UserDict[Union[str, bytes], Any]
-else:
-    _DictBase = collections.UserDict
-
-
 class PdfDict(_DictBase):
     def __setattr__(self, key: str, value: Any) -> None:
         if key == "data":

src/PIL/TiffImagePlugin.py

@@ -47,22 +47,24 @@ import math
 import os
 import struct
 import warnings
-from collections.abc import Iterator, MutableMapping
+from collections.abc import Callable, MutableMapping
 from fractions import Fraction
 from numbers import Number, Rational
-from typing import IO, Any, Callable, NoReturn, cast
+from typing import IO, Any, cast
 
 from . import ExifTags, Image, ImageFile, ImageOps, ImagePalette, TiffTags
 from ._binary import i16be as i16
 from ._binary import i32be as i32
 from ._binary import o8
-from ._typing import StrOrBytesPath
 from ._util import DeferredError, is_path
 from .TiffTags import TYPES
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
-    from ._typing import Buffer, IntegralLike
+    from collections.abc import Iterator
+    from typing import NoReturn
+
+    from ._typing import Buffer, IntegralLike, StrOrBytesPath
 
 logger = logging.getLogger(__name__)
 

src/PIL/_imagingcms.pyi

@@ -1,14 +1,14 @@
 import datetime
 import sys
-from typing import Literal, SupportsFloat, TypedDict
+from typing import Literal, SupportsFloat, TypeAlias, TypedDict
 
 from ._typing import CapsuleType
 
 littlecms_version: str | None
 
-_Tuple3f = tuple[float, float, float]
-_Tuple2x3f = tuple[_Tuple3f, _Tuple3f]
-_Tuple3x3f = tuple[_Tuple3f, _Tuple3f, _Tuple3f]
+_Tuple3f: TypeAlias = tuple[float, float, float]
+_Tuple2x3f: TypeAlias = tuple[_Tuple3f, _Tuple3f]
+_Tuple3x3f: TypeAlias = tuple[_Tuple3f, _Tuple3f, _Tuple3f]
 
 class _IccMeasurementCondition(TypedDict):
     observer: int

src/PIL/_imagingft.pyi

@@ -1,4 +1,5 @@
-from typing import Any, Callable
+from collections.abc import Callable
+from typing import Any
 
 from . import ImageFont, _imaging
 

src/PIL/_typing.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import os
 import sys
 from collections.abc import Sequence
-from typing import Any, Protocol, TypeVar, Union
+from typing import Any, Protocol, TypeVar
 
 TYPE_CHECKING = False
 if TYPE_CHECKING:
@@ -26,19 +26,8 @@ if sys.version_info >= (3, 12):
 else:
     Buffer = Any
 
-if sys.version_info >= (3, 10):
-    from typing import TypeGuard
-else:
-    try:
-        from typing_extensions import TypeGuard
-    except ImportError:
 
-        class TypeGuard:  # type: ignore[no-redef]
-            def __class_getitem__(cls, item: Any) -> type[bool]:
-                return bool
-
-
-Coords = Union[Sequence[float], Sequence[Sequence[float]]]
+Coords = Sequence[float] | Sequence[Sequence[float]]
 
 
 _T_co = TypeVar("_T_co", covariant=True)
@@ -48,7 +37,7 @@ class SupportsRead(Protocol[_T_co]):
     def read(self, length: int = ..., /) -> _T_co: ...
 
 
-StrOrBytesPath = Union[str, bytes, os.PathLike[str], os.PathLike[bytes]]
+StrOrBytesPath = str | bytes | os.PathLike[str] | os.PathLike[bytes]
 
 
-__all__ = ["Buffer", "IntegralLike", "StrOrBytesPath", "SupportsRead", "TypeGuard"]
+__all__ = ["Buffer", "IntegralLike", "StrOrBytesPath", "SupportsRead"]

src/PIL/_util.py

@@ -1,9 +1,12 @@
 from __future__ import annotations
 
 import os
-from typing import Any, NoReturn
 
-from ._typing import StrOrBytesPath, TypeGuard
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import Any, NoReturn, TypeGuard
+
+    from ._typing import StrOrBytesPath
 
 
 def is_path(f: Any) -> TypeGuard[StrOrBytesPath]:

tox.ini

@@ -3,7 +3,7 @@ requires =
     tox>=4.2
 env_list =
     lint
-    py{py3, 314, 313, 312, 311, 310, 39}
+    py{py3, 314, 313, 312, 311, 310}
 
 [testenv]
 deps =
@@ -29,7 +29,5 @@ commands =
 skip_install = true
 deps =
     -r .ci/requirements-mypy.txt
-extras =
-    typing
 commands =
     mypy conftest.py selftest.py setup.py docs src winbuild Tests {posargs}