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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[ENH]: Default `matplotlib.colormaps[None]` to call `matplotlib.colormaps[matplotlib.rcParams['image.cmap']]`?","articleBody":"### Problem\n\nWhile addressing the `matplotlib.cm.get_cmap` deprecation in 3.6:\r\n\r\n```\r\nPendingDeprecationWarning: The get_cmap function will be deprecated in a future version. Use ``matplotlib.colormaps[name]`` instead.\r\n```\r\nI noticed that `None` isn't directly migrate-able \r\n\r\n```\r\nIn [1]: import matplotlib\r\n\r\nIn [2]: matplotlib.cm.get_cmap(None)\r\nOut[2]: \u003cmatplotlib.colors.ListedColormap at 0x11e609e20\u003e\r\n\r\nIn [3]: matplotlib.colormaps[None]\r\nKeyError: 'None is not a known colormap name'\r\n```\n\n### Proposed solution\n\nIt appears from the source that `get_cmap(None)` defaults to  `matplotlib.rcParams['image.cmap']` so it would be nice if `colormaps[None]` could default to that as well.\r\n\r\nOtherwise, it would be nice if this was better documented.","author":{"url":"https://github.com/mroeschke","@type":"Person","name":"mroeschke"},"datePublished":"2022-09-21T21:00:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/23981/matplotlib/issues/23981"}