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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Unavoidable warnings with pybind11 main branch","articleBody":"I am seeing warnings like\n\n```\n\u003cipython-input-4-1eb00ff78cf2\u003e:1: MatplotlibDeprecationWarning: The x parameter as float was deprecated in Matplotlib 3.10 and will be removed in 3.12. Use int(x) instead.\n  plt.show()\n\u003cipython-input-4-1eb00ff78cf2\u003e:1: MatplotlibDeprecationWarning: The y parameter as float was deprecated in Matplotlib 3.10 and will be removed in 3.12. Use int(y) instead.\n  plt.show()\n```\n\nthat come out on every draw ever for the simplest of plots (e.g. `plt.gac(); plt.show()`). \n\nThese are coming from https://github.com/matplotlib/matplotlib/blob/59eafb86ba9f61bb6955260aadb9a4f48fcc14bb/src/_backend_agg_wrapper.cpp#L68-L90\n\nthese warnings triggering are due to a change in pybind11 (only see this with their development branch) and which I bisected to\n\n```\ne8e8d6ab22f39938607f31d457d4d359c130f078 is the first bad commit\ncommit e8e8d6ab22f39938607f31d457d4d359c130f078\nAuthor: Michael Carlstrom \u003crmc@carlstrom.com\u003e\nDate:   Mon Feb 16 23:00:01 2026 -0800\n```\n\nwhich came in via\n\nhttps://github.com/matplotlib/matplotlib/blob/59eafb86ba9f61bb6955260aadb9a4f48fcc14bb/src/_backend_agg_wrapper.cpp#L68-L90\n\nhttps://github.com/pybind/pybind11/pull/5879\n\nWe either need to sort out how to adjust the pybind11 code or remove this warning.\n\n","author":{"url":"https://github.com/tacaswell","@type":"Person","name":"tacaswell"},"datePublished":"2026-04-13T14:11:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/31495/matplotlib/issues/31495"}