René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Constrained Layout scaling of layouts with submerged spines","articleBody":"### Bug summary\n\nI think \"constrained_layout=True\" breaks the mosaic scaling. For example subplot D is smaller than subplot E in the \"Actual Outcome\".  When I use plot.tight_layout() and contrained_layout=False the subplots are the same size as in the \"Expected Outcome\"\n\n### Code for reproduction\n\n```python\nimport matplotlib.pyplot as plt\nimport matplotlib as mpl\n\ndef identify_axes(ax_dict, fontsize=48):\n    \"\"\"\n    Helper to identify the Axes in the examples below.\n\n    Draws the label in a large font in the center of the Axes.\n\n    Parameters\n    ----------\n    ax_dict : dict[str, Axes]\n        Mapping between the title / label and the Axes.\n    fontsize : int, optional\n        How big the label should be.\n    \"\"\"\n    kw = dict(ha=\"center\", va=\"center\", fontsize=fontsize, color=\"darkgrey\")\n    for k, ax in ax_dict.items():\n        ax.text(0.5, 0.5, k, transform=ax.transAxes, **kw)\n\nmosaic = \"\"\"AAADDD\n            AAADDD\n            BBBDDD\n            BBBEEE\n            CCCEEE\n            CCCEEE\"\"\"\nfig = plt.figure(constrained_layout=True)\nax_dict = fig.subplot_mosaic(mosaic)\nidentify_axes(ax_dict)\n```\n\n\n### Actual outcome\n\n![Screen Shot 2022-06-16 at 14 59 13](https://user-images.githubusercontent.com/23243828/174178320-9d2c0190-c5f8-4a13-a40a-c9bfbe64c824.png)\n\n\n### Expected outcome\n\n![Screen Shot 2022-06-16 at 15 02 03](https://user-images.githubusercontent.com/23243828/174181117-0ae64672-0195-4526-aa83-9f6353698bb9.png)\n\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nOS/X\n\n### Matplotlib Version\n\n3.5.1\n\n### Matplotlib Backend\n\nmodule://matplotlib_inline.backend_inline\n\n### Python version\n\n3.9.12\n\n### Jupyter version\n\n3.3.2\n\n### Installation\n\nconda","author":{"url":"https://github.com/lswenson","@type":"Person","name":"lswenson"},"datePublished":"2022-06-16T22:04:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/23290/matplotlib/issues/23290"}