Port requirements to PEP735

.github/workflows/cygwin.yml

@@ -143,7 +143,7 @@ jobs:
         uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57  # v4.2.0
         with:
           path: C:\cygwin\home\runneradmin\.cache\pip
-          key: Cygwin-py3.${{ matrix.python-minor-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
+          key: Cygwin-py3.${{ matrix.python-minor-version }}-pip-${{ hashFiles('pyproject.toml') }}
           restore-keys: ${{ matrix.os }}-py3.${{ matrix.python-minor-version }}-pip-
 
       - name: Cache ccache
@@ -174,10 +174,9 @@ jobs:
       - name: Install Python dependencies
         shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          python -m pip install --upgrade pip setuptools wheel
+          python -m pip install --group build
           python -m pip install kiwisolver 'numpy>=1.22,<1.26' pillow importlib_resources
           grep -v -F -e psutil requirements/testing/all.txt >requirements_test.txt
-          python -m pip install meson-python pybind11
           export PATH="/usr/local/bin:$PATH"
           python -m pip install --no-build-isolation 'contourpy>=1.0.1'
           python -m pip install --upgrade cycler fonttools \

.github/workflows/reviewdog.yml

@@ -22,7 +22,7 @@ jobs:
           python-version: '3.10'
 
       - name: Install flake8
-        run: pip3 install -r requirements/testing/flake8.txt
+        run: pip3 install --group lint
 
       - name: Set up reviewdog
         uses: reviewdog/action-setup@3f401fe1d58fe77e10d665ab713057375e39b887  # v1.3.9
@@ -51,7 +51,7 @@ jobs:
           python-version: '3.10'
 
       - name: Install mypy
-        run: pip3 install -r requirements/testing/mypy.txt -r requirements/testing/all.txt
+        run: pip3 install --group typing
 
       - name: Set up reviewdog
         uses: reviewdog/action-setup@3f401fe1d58fe77e10d665ab713057375e39b887  # v1.3.9

.github/workflows/tests.yml

@@ -50,7 +50,7 @@ jobs:
           - name-suffix: "(Minimum Versions)"
             os: ubuntu-20.04
             python-version: '3.10'
-            extra-requirements: '-c requirements/testing/minver.txt'
+            extra-requirements: '--group test-minver'
             delete-font-cache: true
             # Oldest versions with Py3.10 wheels.
             pyqt5-ver: '==5.15.5 sip==6.3.0'
@@ -61,7 +61,7 @@ jobs:
             python-version: '3.10'
             # One CI run tests ipython/matplotlib-inline before backend mapping moved to mpl
             extra-requirements:
-              -r requirements/testing/extra.txt
+              --group test-extra
               "ipython==7.29.0"
               "ipykernel==5.5.6"
               "matplotlib-inline<0.1.7"
@@ -77,7 +77,7 @@ jobs:
             pyqt6-ver: '!=6.6.0'
             # https://bugreports.qt.io/projects/PYSIDE/issues/PYSIDE-2346
             pyside6-ver: '!=6.5.1'
-            extra-requirements: '-r requirements/testing/extra.txt'
+            extra-requirements: '--group test-extra'
           - os: ubuntu-22.04
             python-version: '3.12'
             # https://www.riverbankcomputing.com/pipermail/pyqt/2023-November/045606.html
@@ -209,15 +209,15 @@ jobs:
         if: startsWith(runner.os, 'Linux')
         with:
           path: ~/.cache/pip
-          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
+          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('pyproject.toml') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-pip-
       - name: Cache pip
         uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57  # v4.2.0
         if: startsWith(runner.os, 'macOS')
         with:
           path: ~/Library/Caches/pip
-          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('requirements/*/*.txt') }}
+          key: ${{ matrix.os }}-py${{ matrix.python-version }}-pip-${{ hashFiles('pyproject.toml') }}
           restore-keys: |
             ${{ matrix.os }}-py${{ matrix.python-version }}-pip-
       - name: Cache ccache
@@ -254,11 +254,7 @@ jobs:
 
           # Install dependencies from PyPI.
           # Preinstall build requirements to enable no-build-isolation builds.
-          python -m pip install --upgrade $PRE \
-            'contourpy>=1.0.1' cycler fonttools kiwisolver importlib_resources \
-            packaging pillow 'pyparsing!=3.1.0' python-dateutil setuptools-scm \
-            'meson-python>=0.13.1' 'pybind11>=2.13.2' \
-            -r requirements/testing/all.txt \
+          python -m pip install --upgrade $PRE --group build --group test \
             ${{ matrix.extra-requirements }}
 
           # Install optional dependencies from PyPI.

azure-pipelines.yml

@@ -71,8 +71,7 @@ stages:
 
           - bash: |
               python -m pip install --upgrade pip
-              python -m pip install --upgrade -r requirements/dev/build-requirements.txt
-              python -m pip install -r requirements/testing/all.txt -r requirements/testing/extra.txt
+              python -m pip install --group build --group test --group test-extra
             displayName: 'Install dependencies with pip'
 
           - bash: |

doc/devel/development_setup.rst

@@ -137,7 +137,7 @@ setup.
 
       Install the Python dependencies with ::
 
-        pip install -r requirements/dev/dev-requirements.txt
+        pip install --group dev
 
       Remember to activate the environment whenever you start working on Matplotlib!
 

doc/devel/release_guide.rst

@@ -420,7 +420,7 @@ To build the documentation you must have the tagged version installed, but
 build the docs from the ``ver-doc`` branch.  An easy way to arrange this is::
 
   pip install matplotlib
-  pip install -r requirements/doc/doc-requirements.txt
+  pip install --group doc
   git checkout v3.7.0-doc
   git clean -xfd
   make -Cdoc O="-t release -j$(nproc)" html latexpdf LATEXMKOPTS="-silent -f"

doc/install/dependencies.rst

@@ -390,17 +390,11 @@ Documentation dependencies
 Python
 ------
 
-The additional Python packages required to build the
-:ref:`documentation <documenting-matplotlib>` are listed in
-:file:`doc-requirements.txt` and can be installed using ::
-
-    pip install -r requirements/doc/doc-requirements.txt
-
-The content of :file:`doc-requirements.txt` is also shown below:
-
-.. include:: ../../requirements/doc/doc-requirements.txt
-   :literal:
+The additional Python packages required to build the :ref:`documentation
+<documenting-matplotlib>` are listed in :file:`pyproject.toml` and can be
+installed using ::
 
+    pip install --group doc
 
 .. _doc-dependencies-external:
 

pyproject.toml

@@ -75,6 +75,118 @@ requires = [
     "setuptools_scm>=7",
 ]
 
+[dependency-groups]
+build = [
+    "pybind11>=2.13.2,!=2.13.3",
+    "meson-python",
+    "setuptools-scm",
+]
+dev = [
+    {include-group= "build"},
+    {include-group = "doc"},
+    {include-group = "test"},
+    {include-group = "test-extra"},
+    {include-group = "lint"},
+]
+# Requirements for building docs
+#
+# You will first need a matching Matplotlib installation
+# e.g (from the Matplotlib root directory)
+#     pip install --no-build-isolation --editable .[dev]
+#
+# Install the documentation requirements with:
+#     pip install -r requirements/doc/doc-requirements.txt
+#
+doc = [
+    "sphinx>=5.1.0,!=6.1.2",
+    "colorspacious",
+    "ipython",
+    "ipywidgets",
+    "ipykernel",
+    "numpydoc>=1.0",
+    "packaging>=20",
+    "pydata-sphinx-theme~=0.15.0",
+    "mpl-sphinx-theme~=3.9.0",
+    "pyyaml",
+    "PyStemmer",
+    "sphinxcontrib-svg2pdfconverter>=1.1.0",
+    "sphinxcontrib-video>=0.2.1",
+    "sphinx-copybutton",
+    "sphinx-design",
+    "sphinx-gallery[parallel]>=0.12.0",
+    "sphinx-tags>=0.4.0",
+]
+
+# pip requirements for all the CI builds
+test = [
+    "black<24",
+    "certifi",
+    "coverage!=6.3",
+    "psutil",
+    "pytest!=4.6.0,!=5.4.0,!=8.1.0",
+    "pytest-cov",
+    "pytest-rerunfailures",
+    "pytest-timeout",
+    "pytest-xdist",
+    "pytest-xvfb",
+    "tornado",
+]
+
+# Extra pip requirements for the Python 3.10+ builds
+test-extra = [
+    "--prefer-binary",
+    "ipykernel",
+    # jupyter/nbconvert#1970 for the 7.3 series exclusions
+    "nbconvert[execute]!=6.0.0,!=6.0.1,!=7.3.0,!=7.3.1",
+    "nbformat!=5.0.0,!=5.0.1",
+    "pandas!=0.25.0",
+    "pikepdf",
+    "pytz",
+    "pywin32; sys.platform == 'win32'",
+    "xarray",
+]
+
+# Extra pip requirements for the minimum-version CI run
+test-minver = [
+    "contourpy==1.0.1",
+    "cycler==0.10",
+    "fonttools==4.22.0",
+    "importlib-resources==3.2.0",
+    "kiwisolver==1.3.2",
+    "meson-python==0.13.1",
+    "meson==1.1.0",
+    "numpy==1.23.0",
+    "packaging==20.0",
+    "pillow==8.3.2",
+    "pyparsing==2.3.1",
+    "pytest==7.0.0",
+    "python-dateutil==2.7",
+]
+
+# Extra pip requirements for the GitHub Actions flake8 build
+lint = [
+    "flake8>=3.8",
+    # versions less than 5.1.0 raise on some interp'd docstrings
+    "pydocstyle>=5.1.0",
+    # 1.4.0 adds docstring-convention=all
+    "flake8-docstrings>=1.4.0",
+    # fix bug where flake8 aborts checking on syntax error
+    "flake8-force",
+]
+
+# Extra pip requirements for the GitHub Actions mypy build
+typing = [
+    "mypy>=1.9",
+    "typing-extensions>=4.6",
+    # Extra stubs distributed separately from the main pypi package
+    "pandas-stubs",
+    "types-pillow",
+    "types-python-dateutil",
+    "types-psutil",
+    "sphinx",
+    {include-group = build},
+]    
+
 [tool.meson-python.args]
 install = ['--tags=data,python-runtime,runtime']
 

tox.ini

@@ -33,6 +33,6 @@ changedir = {tox_root}
 commands =
     python tools/stubtest.py
 usedevelop = False
-deps =
-    -r requirements/testing/mypy.txt
-    -r requirements/testing/all.txt
+dependency_groups =
+    test
+    typing