René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: matshow(..., fignum=...) broken","articleBody":"### Bug summary\n\nFrom Version 3.10.0, `plt.matshow(..., fignum=...)` is broken.\nI tested against the last nightly release matplotlib-3.11.0.dev377+g6c5e3f3348, where it is still broken.\n\n### Code for reproduction\n\n```Python\nimport numpy as np\nimport matplotlib.pyplot as plt\n\nfig = plt.figure()\nplt.matshow(np.random.random([3, 3]), fignum=fig.number)\n```\n\n### Actual outcome\n\n```\nTraceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n  File \"/home/wehandre/mambaforge/envs/temptest/lib/python3.12/site-packages/matplotlib/pyplot.py\", line 2668, in matshow\n    fig = figure(fignum, figsize=figaspect(A))\n          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"/home/wehandre/mambaforge/envs/temptest/lib/python3.12/site-packages/matplotlib/pyplot.py\", line 1013, in figure\n    if any([figsize, dpi, facecolor, edgecolor, not frameon,\n       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()\n```\n\n### Expected outcome\n\nNo error\n\n### Additional information\n\nThe issue is, that `figsize` is a NumPy array, and thus cannot be used within `any`. `figsize` is the result of the function [`matplotlib.figure.figaspect`](https://matplotlib.org/stable/api/figure_api.html#matplotlib.figure.figaspect). To my knowledge, previously, this returned a tuple, which can be evaluated as a boolean. The documentation still suggests that the result is a tuple. However, I don't see any changes to `matshow` or `figaspect` inspecting their blames.\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.10.0\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n3.12.8\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/DerWeh","@type":"Person","name":"DerWeh"},"datePublished":"2025-01-28T20:56:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/29540/matplotlib/issues/29540"}