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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Pillow 11.3 raises a deprecation warning when using TkAgg","articleBody":"### Bug summary\n\nThe `'mode'` parameter from `Image.fromarray` [has been deprecated](https://pillow.readthedocs.io/en/stable/deprecations.html#image-fromarray-mode-parameter), which is used in matplotlib to plot figures using the tkinter backend.\n\n### Code for reproduction\n\n```Python\n# python -Wd\nimport matplotlib\nfrom matplotlib import pyplot\nmatplotlib.use(\"tkagg\")\npyplot.subplots()\n```\n\n### Actual outcome\n\n```\nDeprecationWarning: 'mode' parameter is deprecated and will be removed in Pillow 13 (2026-10-15)\n```\n\n### Expected outcome\n\nNo deprecation warning\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nUbuntu (this bug is also present on Windows)\n\n### Matplotlib Version\n\n3.10.3 (pillow==11.3.0)\n\n### Matplotlib Backend\n\nTkAgg\n\n### Python version\n\nPython 3.12.4\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\nNone","author":{"url":"https://github.com/Vincent-Maladiere","@type":"Person","name":"Vincent-Maladiere"},"datePublished":"2025-07-09T14:58:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/30280/matplotlib/issues/30280"}