matplotlib · egormartiniuc · Sep 13, 2021 · Sep 14, 2021 · Sep 14, 2021 · Sep 15, 2021
diff --git a/.appveyor.yml b/.appveyor.yml
@@ -60,6 +60,8 @@ install:
   # pull pywin32 from conda because on py38 there is something wrong with finding
   # the dlls when insalled from pip
   - conda install -c conda-forge pywin32
+  # install pyqt from conda-forge
+  - conda install -c conda-forge pyqt
   - echo %PYTHON_VERSION% %TARGET_ARCH%
   # Install dependencies from PyPI.
   - python -m pip install --upgrade -r requirements/testing/all.txt %EXTRAREQS% %PINNEDVERS%

diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -105,6 +105,13 @@ commands:
       - run:
           name: Install Matplotlib
           command: python -m pip install --user -ve .
+      - save_cache:
+          key: build-deps-1
+          paths:
+            # FreeType 2.6.1 tarball.
+            - ~/.cache/matplotlib/0a3c7dfbda6da1e8fce29232e8e96d987ababbbf71ebc8c75659e4132c367014
+            # Qhull 2020.2 tarball.
+            - ~/.cache/matplotlib/b5c2d7eb833278881b952c8a52d20179eab87766b00b865000469a45c1838b7e
 
   doc-build:
     steps:
@@ -117,15 +124,13 @@ commands:
           command: |
             # Set epoch to date of latest tag.
             export SOURCE_DATE_EPOCH="$(git log -1 --format=%at $(git describe --abbrev=0))"
-            # Include analytics only when deploying to devdocs.
-            if [ "$CIRCLE_PROJECT_USERNAME" != "matplotlib" ] || \
-               [ "$CIRCLE_BRANCH" != "master" ] || \
-               [[ "$CIRCLE_PULL_REQUEST" == https://github.com/matplotlib/matplotlib/pull/* ]]; then
-              export ANALYTICS=False
-            else
-              export ANALYTICS=True
+            # Set release mode only when deploying to devdocs.
+            if [ "$CIRCLE_PROJECT_USERNAME" = "matplotlib" ] && \
+               [ "$CIRCLE_BRANCH" = "master" ] && \
+               [ "$CIRCLE_PR_NUMBER" = "" ]; then
+              export RELEASE_TAG='-t release'
             fi
-            make html O="-T -Ainclude_analytics=$ANALYTICS"
+            make html O="-T $RELEASE_TAG"
             rm -r build/html/_sources
           working_directory: doc
       - save_cache:

diff --git a/.flake8 b/.flake8
@@ -85,7 +85,7 @@ per-file-ignores =
     lib/mpl_toolkits/tests/conftest.py: F401
     lib/pylab.py: F401, F403
 
-    doc/conf.py: E402, E501
+    doc/conf.py: E402
     tutorials/advanced/path_tutorial.py: E402
     tutorials/advanced/patheffects_guide.py: E402
     tutorials/advanced/transforms_tutorial.py: E402, E501
@@ -120,11 +120,15 @@ per-file-ignores =
     examples/style_sheets/plot_solarizedlight2.py: E501
     examples/subplots_axes_and_figures/demo_constrained_layout.py: E402
     examples/text_labels_and_annotations/custom_legends.py: E402
-    examples/ticks_and_spines/date_concise_formatter.py: E402
+    examples/ticks/date_concise_formatter.py: E402
     examples/user_interfaces/embedding_in_gtk3_panzoom_sgskip.py: E402
     examples/user_interfaces/embedding_in_gtk3_sgskip.py: E402
-    examples/user_interfaces/gtk_spreadsheet_sgskip.py: E402
+    examples/user_interfaces/embedding_in_gtk4_panzoom_sgskip.py: E402
+    examples/user_interfaces/embedding_in_gtk4_sgskip.py: E402
+    examples/user_interfaces/gtk3_spreadsheet_sgskip.py: E402
+    examples/user_interfaces/gtk4_spreadsheet_sgskip.py: E402
     examples/user_interfaces/mpl_with_glade3_sgskip.py: E402
-    examples/user_interfaces/pylab_with_gtk_sgskip.py: E402
+    examples/user_interfaces/pylab_with_gtk3_sgskip.py: E402
+    examples/user_interfaces/pylab_with_gtk4_sgskip.py: E402
     examples/user_interfaces/toolmanager_sgskip.py: E402
     examples/userdemo/pgf_preamble_sgskip.py: E402
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
@@ -1,3 +1,3 @@
 # These are supported funding model platforms
-github: [numfocus]
+github: [matplotlib, numfocus]
 custom: https://numfocus.org/donate-to-matplotlib
diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
@@ -15,9 +15,10 @@ jobs:
     env:
       min-numpy-version: "1.17.3"
       min-numpy-hash: "b6/d6/be8f975f5322336f62371c9abeb936d592c98c047ad63035f1b38ae08efe"
+      CIBW_ARCHS_MACOS: "x86_64 universal2 arm64"
     strategy:
       matrix:
-        os: [ubuntu-18.04, windows-latest, macos-latest]
+        os: [ubuntu-18.04, windows-latest, macos-10.15]
         cibw_archs: ["auto"]
         include:
           - os: ubuntu-18.04
@@ -60,6 +61,18 @@ jobs:
           CIBW_BUILD: "cp37-* cp38-*"
           CIBW_ARCHS: aarch64
 
+      - name: Build wheels for CPython 3.10
+        run: |
+          python -m cibuildwheel --output-dir dist
+        if: matrix.os != 'macos-10.15'
+        env:
+          CIBW_BUILD: "cp310-*"
+          CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
+          CIBW_MANYLINUX_I686_IMAGE: manylinux2014
+          CIBW_BEFORE_BUILD: pip install certifi numpy==1.21.2
+          MPL_DISABLE_FH4: "yes"
+          CIBW_ARCHS: ${{ matrix.cibw_archs }}
+
       - name: Build wheels for CPython 3.9
         run: |
           python -m cibuildwheel --output-dir dist
@@ -89,6 +102,7 @@ jobs:
           CIBW_BUILD: "pp37-*"
           CIBW_BEFORE_BUILD: pip install certifi numpy==${{ env.min-numpy-version }}
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
+          PIP_USE_FEATURE: in-tree-build
         if: matrix.cibw_archs != 'aarch64'
 
       - name: Validate that LICENSE files are included in wheels

diff --git a/.github/workflows/clean_pr.yml b/.github/workflows/clean_pr.yml
@@ -0,0 +1,22 @@
+name: PR cleanliness
+on: [pull_request]
+
+jobs:
+  pr_clean:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: '0'
+      - name: Check for added-and-deleted files
+        run: |
+          git fetch --quiet origin "$GITHUB_BASE_REF"
+          base="$(git merge-base "origin/$GITHUB_BASE_REF" 'HEAD^2')"
+          ad="$(git log "$base..HEAD^2" --pretty=tformat: --name-status --diff-filter=AD |
+                cut --fields 2 | sort | uniq --repeated)"
+          if [[ -n "$ad" ]]; then
+            printf 'The following files were both added and deleted in this PR:\n%s\n' "$ad"
+            exit 1
+          fi
+
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -171,37 +171,38 @@ jobs:
           # (sometimes, the install appears to be successful but shared
           # libraries cannot be loaded at runtime, so an actual import is a
           # better check).
-          if [[ "${{ runner.os }}" != 'macOS' ]]; then
-            # PyGObject, pycairo, and cariocffi do not install on OSX 10.12.
-             python -m pip install --upgrade pycairo 'cairocffi>=0.8' PyGObject &&
-               python -c 'import gi; gi.require_version("Gtk", "3.0"); from gi.repository import Gtk' &&
-               echo 'PyGObject is available' ||
-               echo 'PyGObject is not available'
+          # PyGObject, pycairo, and cariocffi do not install on OSX 10.12.
+           python -m pip install --upgrade pycairo 'cairocffi>=0.8' PyGObject &&
+             python -c 'import gi; gi.require_version("Gtk", "3.0"); from gi.repository import Gtk' &&
+             echo 'PyGObject is available' ||
+             echo 'PyGObject is not available'
 
-            # There are no functioning wheels available for OSX 10.12 (as of
-            # Sept 2020) for either pyqt5 (there are only wheels for 10.13+) or
-            # pyside2 (the latest version (5.13.2) with 10.12 wheels has a
-            # fatal to us bug, it was fixed in 5.14.0 which has 10.13 wheels)
-            python -mpip install --upgrade pyqt5${{ matrix.pyqt5-ver }} &&
-              python -c 'import PyQt5.QtCore' &&
-              echo 'PyQt5 is available' ||
-              echo 'PyQt5 is not available'
+          # There are no functioning wheels available for OSX 10.12 (as of
+          # Sept 2020) for either pyqt5 (there are only wheels for 10.13+) or
+          # pyside2 (the latest version (5.13.2) with 10.12 wheels has a
+          # fatal to us bug, it was fixed in 5.14.0 which has 10.13 wheels)
+          python -mpip install --upgrade pyqt5${{ matrix.pyqt5-ver }} &&
+            python -c 'import PyQt5.QtCore' &&
+            echo 'PyQt5 is available' ||
+            echo 'PyQt5 is not available'
+          if [[ "${{ runner.os }}" != 'macOS' ]]; then
             python -mpip install --upgrade pyside2 &&
               python -c 'import PySide2.QtCore' &&
               echo 'PySide2 is available' ||
               echo 'PySide2 is not available'
-            # Qt6 crashes on Github's ubuntu 18.04 runner.
-            if [[ "${{ matrix.os }}" = ubuntu-20.04 ]]; then
-              python -mpip install --upgrade pyqt6 &&
-                python -c 'import PyQt6.QtCore' &&
-                echo 'PyQt6 is available' ||
-                echo 'PyQt6 is not available'
-              python -mpip install --upgrade pyside6 &&
-                python -c 'import PySide6.QtCore' &&
-                echo 'PySide6 is available' ||
-                echo 'PySide6 is not available'
-            fi
           fi
+          # Qt6 crashes on Github's ubuntu 18.04 runner.
+          if [[ "${{ matrix.os }}" = ubuntu-20.04 ]]; then
+            python -mpip install --upgrade pyqt6 &&
+              python -c 'import PyQt6.QtCore' &&
+              echo 'PyQt6 is available' ||
+              echo 'PyQt6 is not available'
+            python -mpip install --upgrade pyside6 &&
+              python -c 'import PySide6.QtCore' &&
+              echo 'PySide6 is available' ||
+              echo 'PySide6 is not available'
+          fi
+
           python -mpip install --upgrade \
             -f "https://extras.wxpython.org/wxPython4/extras/linux/gtk3/${{ matrix.os }}" \
             wxPython &&

diff --git a/.gitignore b/.gitignore
@@ -72,6 +72,7 @@ doc/plot_types
 doc/pyplots/tex_demo.png
 doc/tutorials
 lib/dateutil
+examples/*/*.bmp
 examples/*/*.eps
 examples/*/*.pdf
 examples/*/*.png

diff --git a/LICENSE/LICENSE_COURIERTEN b/LICENSE/LICENSE_COURIERTEN
@@ -0,0 +1,18 @@
+The Courier10PitchBT-Bold.pfb file is a Type-1 version of
+Courier 10 Pitch BT Bold by Bitstream, obtained from
+<https://ctan.org/tex-archive/fonts/courierten>. It is included
+here as test data only, but the following license applies.
+
+
+(c) Copyright 1989-1992, Bitstream Inc., Cambridge, MA.
+
+You are hereby granted permission under all Bitstream propriety rights
+to use, copy, modify, sublicense, sell, and redistribute the 4 Bitstream
+Charter (r) Type 1 outline fonts and the 4 Courier Type 1 outline fonts
+for any purpose and without restriction; provided, that this notice is
+left intact on all copies of such fonts and that Bitstream's trademark
+is acknowledged as shown below on all unmodified copies of the 4 Charter
+Type 1 fonts.
+
+BITSTREAM CHARTER is a registered trademark of Bitstream Inc.
+
diff --git a/README.rst b/README.rst
@@ -42,53 +42,52 @@
 
 .. image:: https://matplotlib.org/_static/logo2.svg
 
-Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations in Python.
+Matplotlib is a comprehensive library for creating static, animated, and
+interactive visualizations in Python.
 
 Check out our `home page <https://matplotlib.org/>`_ for more information.
 
 .. image:: https://matplotlib.org/_static/readme_preview.png
 
-Matplotlib produces publication-quality figures in a variety of hardcopy formats
-and interactive environments across platforms. Matplotlib can be used in Python scripts,
-the Python and IPython shell, web application servers, and various
-graphical user interface toolkits.
+Matplotlib produces publication-quality figures in a variety of hardcopy
+formats and interactive environments across platforms. Matplotlib can be used
+in Python scripts, the Python and IPython shell, web application servers, and
+various graphical user interface toolkits.
 
 
 Install
 =======
 
 For installation instructions and requirements, see `INSTALL.rst <INSTALL.rst>`_  or the
-`install <https://matplotlib.org/users/installing.html>`_ documentation.
-
-Test
-====
-
-After installation, launch the test suite::
-
-  python -m pytest
-
-Read the `testing guide <https://matplotlib.org/devel/testing.html>`_ for more information and alternatives.
+`install <https://matplotlib.org/stable/users/installing.html>`_ documentation.
 
 Contribute
 ==========
+
 You've discovered a bug or something else you want to change - excellent!
 
 You've worked out a way to fix it – even better!
 
 You want to tell us about it – best of all!
 
-Start at the `contributing guide <https://matplotlib.org/devdocs/devel/contributing.html>`_!
+Start at the `contributing guide
+<https://matplotlib.org/devdocs/devel/contributing.html>`_!
 
 Contact
 =======
 
-`Discourse <https://discourse.matplotlib.org/>`_ is the discussion forum for general questions and discussions and our recommended starting point.
+`Discourse <https://discourse.matplotlib.org/>`_ is the discussion forum for
+general questions and discussions and our recommended starting point.
 
 Our active mailing lists (which are mirrored on Discourse) are:
 
-* `Users <https://mail.python.org/mailman/listinfo/matplotlib-users>`_ mailing list: matplotlib-users@python.org
-* `Announcement  <https://mail.python.org/mailman/listinfo/matplotlib-announce>`_ mailing list: matplotlib-announce@python.org
-* `Development <https://mail.python.org/mailman/listinfo/matplotlib-devel>`_ mailing list: matplotlib-devel@python.org
+* `Users <https://mail.python.org/mailman/listinfo/matplotlib-users>`_ mailing
+  list: matplotlib-users@python.org
+* `Announcement
+  <https://mail.python.org/mailman/listinfo/matplotlib-announce>`_ mailing
+  list: matplotlib-announce@python.org
+* `Development <https://mail.python.org/mailman/listinfo/matplotlib-devel>`_
+  mailing list: matplotlib-devel@python.org
 
 Gitter_ is for coordinating development and asking questions directly related
 to contributing to matplotlib.
@@ -99,21 +98,21 @@ Citing Matplotlib
 If Matplotlib contributes to a project that leads to publication, please
 acknowledge this by citing Matplotlib.
 
-`A ready-made citation entry <https://matplotlib.org/citing.html>`_ is available.
+`A ready-made citation entry <https://matplotlib.org/stable/citing.html>`_ is
+available.
 
 Research notice
 ~~~~~~~~~~~~~~~
 
 Please note that this repository is participating in a study into
 sustainability of open source projects. Data will be gathered about this
-repository for approximately the next 12 months, starting from June
-2021.
+repository for approximately the next 12 months, starting from June 2021.
 
-Data collected will include number of contributors, number of PRs, time
-taken to close/merge these PRs, and issues closed.
+Data collected will include number of contributors, number of PRs, time taken
+to close/merge these PRs, and issues closed.
 
-For more information, please visit `the informational
-page <https://sustainable-open-science-and-software.github.io/>`__ or
-download the `participant information
-sheet <https://sustainable-open-science-and-software.github.io/assets/PIS_sustainable_software.pdf>`__.
+For more information, please visit `the informational page
+<https://sustainable-open-science-and-software.github.io/>`__ or download the
+`participant information sheet
+<https://sustainable-open-science-and-software.github.io/assets/PIS_sustainable_software.pdf>`__.
 
diff --git a/doc/_static/mpl.css b/doc/_static/mpl.css
@@ -207,8 +207,41 @@ does not float with it.
 
 }
 
+/* slightly reduce horizontal margin compared to gallery.css to
+ * get four columns of thumbnails in the pydata-sphinx-theme. */
+.sphx-glr-thumbcontainer {
+    margin: 5px 2px;
+}
+
+/* workaround: the default padding decenters the image inside the frame */
+.sphx-glr-thumbcontainer .figure {
+    padding: 0;
+}
 
 table.property-table th,
 table.property-table td {
     padding: 4px 10px;
 }
+
+.sidebar-cheatsheets, .sidebar-donate {
+    margin: 2.75rem 0;
+}
+
+.sidebar-donate .mpl-button {
+    /* fix width to width of cheatsheet */
+    width: 210px;
+}
+
+/* Two columns for install code blocks */
+div.twocol {
+    padding-left: 0;
+    padding-right: 0;
+    display: flex;
+    gap: 20px;
+}
+
+div.twocol > div {
+    flex-grow: 1;
+    padding: 0;
+    margin: 0;
+}
diff --git a/doc/_templates/cheatsheet_sidebar.html b/doc/_templates/cheatsheet_sidebar.html
@@ -0,0 +1,9 @@
+
+<div class="sidebar-cheatsheets">
+  <h3>Matplotlib cheatsheets</h3>
+  <a href="https://github.com/matplotlib/cheatsheets#cheatsheets">
+    <img src="_static/mpl_cheatsheet1.png"
+         alt="Matplotlib cheatsheets"
+         srcset="_static/mpl_cheatsheet1.png 1x, _static/mpl_cheatsheet1_2x.png 2x"/>
+  </a>
+</div>
diff --git a/doc/_templates/donate_sidebar.html b/doc/_templates/donate_sidebar.html
@@ -1,6 +1,8 @@
 
 
 
-<div id="sidebar-donations">
-  <a href="https://numfocus.org/donate-to-matplotlib" target="_blank"> <span class="mpl-button donate_button" >Support Matplotlib</span></a>
+<div class="sidebar-donate">
+  <a href="https://numfocus.org/donate-to-matplotlib" target="_blank">
+    <span class="mpl-button" >Support Matplotlib</span>
+  </a>
 </div>