René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Axes.pie([0, 0]) crashes with “cannot convert float NaN to integer” when all slice sizes are zero","articleBody":"Calling ax.pie() with all-zero data leads to an internal NaN→int conversion failure, rather than a clean “all zero input” error or an empty plot.\n\n\nReproducible example\n\n```\nimport matplotlib\nmatplotlib.use('Agg')\nimport matplotlib.pyplot as plt\nfig, ax = plt.subplots()\nax.pie([0, 0], labels=[\"A\", \"B\"])\nfig.savefig(\"out.png\")`\n```\n\nTraceback\n\n\n```\nRuntimeWarning: invalid value encountered in divide\n  x = x / sx\n...\n  File \".../matplotlib/axes/_axes.py\", line 3409, in pie\n    w = mpatches.Wedge((x, y), radius, 360. * min(theta1, theta2),\n      ...\n  File \".../matplotlib/patches.py\", line 1264, in _recompute_path\n    arc = Path.arc(theta1, theta2)\n  File \".../matplotlib/path.py\", line 961, in arc\n    n = int(2 ** np.ceil((eta2 - eta1) / halfpi))\nValueError: cannot convert float NaN to integer\n```\n\n\nExpected behavior\n\nEither:\n\nRender an empty/placeholder pie when slice‐sizes sum to zero\n\nOr raise a clear ValueError(\"All wedge sizes zero\") before entering the NaN conversion","author":{"url":"https://github.com/PouyaSA96","@type":"Person","name":"PouyaSA96"},"datePublished":"2025-05-04T05:39:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/30007/matplotlib/issues/30007"}