René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Changing limits by setting ticks does not emit \"x/ylim_changed\"","articleBody":"### Bug summary\n\n\"x/ylim_changed\" should be emitted whenever the limits of an axis is changed. However, when the limits are changed via as a consequence of `ax.set_xticks`, the signal is not emitted.\n\n\n### Code for reproduction\n\n```Python\nimport matplotlib.pyplot as plt\n\ndef xlim_changed(ax):\n    print(f'xlim changed to: {ax.get_xlim()}')\n\nfig, ax = plt.subplots()\nax.callbacks.connect(\"xlim_changed\", xlim_changed)\nax.set_xlim(0.5, 1)        # emits \"xlim_changed\" as expected\nax.set_xticks([0, 100])  # does not emit \"xlim_changed\"\n```\n\n### Actual outcome\n\nxlim changed to: (np.float64(0.5), np.float64(1.0))\n\n### Expected outcome\n\nxlim changed to: (np.float64(0.5), np.float64(1.0))\nxlim changed to: (np.float64(0.0), np.float64(100.0))\n\n\n\n### Additional information\n\nI became aware of this bug while working on https://github.com/matplotlib/matplotlib/pull/31214\n\nfor reference the plot produced by the above code looks like this:\n\u003cimg width=\"560\" height=\"418\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/c7518cae-5563-4fd0-ad74-148b952f6342\" /\u003e\n\n### Operating system\n\nUbuntu\n\n### Matplotlib Version\n\n3.11.0.dev\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n3.13\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\ngit checkout","author":{"url":"https://github.com/trygvrad","@type":"Person","name":"trygvrad"},"datePublished":"2026-03-06T20:14:46.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/31247/matplotlib/issues/31247"}