René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"colormaps don't have getters for under, over, bad colors.","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\ncolormaps don't have getters for under, over, bad colors (although the corresponding setters exist).\r\nI am writing a function that accepts a colormap as an argument. I want to ensure that the colormap passed to the function has the same color for the \"bad\" and \"under\" conditions. The only way around this is to access \"private\" attributes `cmap._rgba_under`, `cmap._rgba_bad` as shown below.\r\n\u003c!--A short 1-2 sentences that succinctly describes the bug--\u003e\r\n\r\n**Code for reproduction**\r\n\u003c!--A minimum code snippet required to reproduce the bug.\r\nPlease make sure to minimize the number of dependencies required, and provide\r\nany necessary plotted data.\r\nAvoid using threads, as Matplotlib is (explicitly) not thread-safe.--\u003e\r\n\r\n```python\r\ncmap = plt.get_cmap('cividis')\r\ncmap.set_bad('k')\r\ncmap.set_under('k')\r\n\r\nassert cmap._rgba_bad == cmap._rgba_under\r\n```\r\n\r\nIf adding getters (for under, over, bad colors) for the colormaps sounds like a good improvement, i would be interested in submitting a PR.\r\n\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n```\r\n# If applicable, paste the console output here\r\n#\r\n#\r\n```\r\n\r\n**Expected outcome**\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system:\r\n  * Matplotlib version: \r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version:\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\n","author":{"url":"https://github.com/pharshalp","@type":"Person","name":"pharshalp"},"datePublished":"2020-01-02T19:52:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/16075/matplotlib/issues/16075"}