René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Mypy stubtest failure on disjoint_base","articleBody":"### Bug summary\n\nThe recently released MyPy 18.1 supports [PEP 800 – Disjoint bases in the type system](https://peps.python.org/pep-0800/). stubtest now flags the following errors in CI (e.g. in https://github.com/matplotlib/matplotlib/pull/30543/commits/0a744f0ba180dca0a73bf351db89796a9854c7d6)\n\n### Actual outcome\n\n```\nmatplotlib.dviread.Text is a disjoint base at runtime, but isn't marked with @disjoint_base in the stub\n\u003cTypeInfo matplotlib.dviread.Text\u003e\nRuntime: in file /home/runner/work/matplotlib/matplotlib/lib/matplotlib/dviread.py:69\ndef (x, y, font, glyph, width)\n\nRaw Output:\nerror: matplotlib.dviread.Text is a disjoint base at runtime, but isn't marked with @disjoint_base in the stub\nStub: in file /home/runner/work/matplotlib/matplotlib/lib/matplotlib/dviread.pyi:31\n\u003cTypeInfo matplotlib.dviread.Text\u003e\nRuntime: in file /home/runner/work/matplotlib/matplotlib/lib/matplotlib/dviread.py:69\ndef (x, y, font, glyph, width)\n```\n\n\n```\nmatplotlib.container.Container is a disjoint base at runtime, but isn't marked with @disjoint_base in the stub\n\u003cTypeInfo matplotlib.container.Container\u003e\nRuntime: in file /home/runner/work/matplotlib/matplotlib/lib/matplotlib/container.py:5\ndef (*args, **kwargs)\n\nRaw Output:\nerror: matplotlib.container.Container is a disjoint base at runtime, but isn't marked with @disjoint_base in the stub\nStub: in file /home/runner/work/matplotlib/matplotlib/lib/matplotlib/container.pyi:10\n\u003cTypeInfo matplotlib.container.Container\u003e\nRuntime: in file /home/runner/work/matplotlib/matplotlib/lib/matplotlib/container.py:5\ndef (*args, **kwargs)\n```\n\n### Expected outcome\n\nNo error.\n\n","author":{"url":"https://github.com/timhoffm","@type":"Person","name":"timhoffm"},"datePublished":"2025-09-12T08:52:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/30551/matplotlib/issues/30551"}