Merge pull request #30918 from tacaswell/fix/py314_eventloop

timhoffm · web-flow · commit d4ff5fadc58d · 2026-01-08T11:03:41.000+01:00
TST: account for asyncio changes in py314
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -73,6 +73,8 @@ jobs:
             pygobject-ver: '<3.52.0'
           - os: ubuntu-24.04
             python-version: '3.12'
+          - os: ubuntu-24.04
+            python-version: '3.14'
           - os: ubuntu-24.04-arm
             python-version: '3.12'
           - os: macos-14  # This runner is on M1 (arm64) chips.
@@ -87,6 +89,10 @@ jobs:
             python-version: '3.13'
             # https://github.com/matplotlib/matplotlib/issues/29732
             pygobject-ver: '<3.52.0'
+          - os: macos-15  # This runner is on M1 (arm64) chips.
+            python-version: '3.14'
+            # https://github.com/matplotlib/matplotlib/issues/29732
+            pygobject-ver: '<3.52.0'
 
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8  # v6.0.1
@@ -264,8 +270,8 @@ jobs:
           # Even though PySide2 wheels can be installed on Python 3.12+, they are broken and since PySide2 is
           # deprecated, they are unlikely to be fixed. For the same deprecation reason, there are no wheels
           # on M1 macOS, so don't bother there either.
-          if [[ "${{ matrix.os }}" != 'macos-14'
-                && "${{ matrix.python-version }}" != '3.12' && "${{ matrix.python-version }}" != '3.13' ]]; then
+          if [[ "${{ matrix.os }}" != 'macos-14' && "${{ matrix.python-version }}" == '3.11'
+                ]]; then
             python -mpip install --upgrade pyside2 &&
               python -c 'import PySide2.QtCore' &&
               echo 'PySide2 is available' ||
diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
@@ -208,6 +208,10 @@ def check_alt_backend(alt_backend):
     if fig.canvas.toolbar:  # i.e toolbar2.
         fig.canvas.toolbar.draw_rubberband(None, 1., 1, 2., 2)
 
+    if backend == 'webagg' and sys.version_info >= (3, 14):
+        import asyncio
+        asyncio.set_event_loop(asyncio.new_event_loop())
+
     timer = fig.canvas.new_timer(1.)  # Test that floats are cast to int.
     timer.add_callback(KeyEvent("key_press_event", fig.canvas, "q")._process)
     # Trigger quitting upon draw.
