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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"matplotlibrc validates some parameters wrongly","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\n\r\nI would like to set how xticks are aligned. There is the ha (for horizontalalignment) parameter which controls this with the possible values 'left', 'center' and 'right'.\r\nTo globally set this parameter, I tried to set `xtick.alignment` in my .matplotlibrc config file.\r\nHowever when setting it to 'left', I get an error (when I start ipython): \r\n\r\n\u003e Bad val 'right' on line #27\r\n\u003e         \"xtick.alignment : right\r\n\u003e \"\r\n\u003e         in file \"/home/moritz/.config/matplotlib/matplotlibrc\"\r\n\u003e         Key xtick.alignment: Unrecognized alignment string 'right': valid strings are ['center', 'top', 'bottom', 'baseline', 'center_baseline']\r\n\r\nSo I tried to set it to 'bottom' (to see what happens) and plotted a simple curve (see code below), but then I got a ValueError:\r\n\r\n\u003e ...\r\n\u003e /usr/lib/python3.8/site-packages/matplotlib/text.py in __init__(self, x, y, text, color, verticalalignment, horizontalalignment, multialignment, fontproperties, rotation, linespacing, rotation_mode, usetex, wrap, **kwargs)\r\n\u003e     156         self.set_wrap(wrap)\r\n\u003e     157         self.set_verticalalignment(verticalalignment)\r\n\u003e --\u003e 158         self.set_horizontalalignment(horizontalalignment)\r\n\u003e     159         self._multialignment = multialignment\r\n\u003e     160         self._rotation = rotation\r\n\u003e \r\n\u003e /usr/lib/python3.8/site-packages/matplotlib/text.py in set_horizontalalignment(self, align)\r\n\u003e     940         align : {'center', 'right', 'left'}\r\n\u003e     941         \"\"\"\r\n\u003e --\u003e 942         cbook._check_in_list(['center', 'right', 'left'], align=align)\r\n\u003e     943         self._horizontalalignment = align\r\n\u003e     944         self.stale = True\r\n\u003e \r\n\u003e /usr/lib/python3.8/site-packages/matplotlib/cbook/__init__.py in _check_in_list(values, **kwargs)\r\n\u003e    2189     for k, v in kwargs.items():\r\n\u003e    2190         if v not in values:\r\n\u003e -\u003e 2191             raise ValueError(\r\n\u003e    2192                 \"{!r} is not a valid value for {}; supported values are {}\"\r\n\u003e    2193                 .format(v, k, ', '.join(map(repr, values))))\r\n\u003e \r\n\u003e ValueError: 'top' is not a valid value for align; supported values are 'center', 'right', 'left'\r\n\r\nIn conclusion, the matplotlibrc validation for the xtick.alignment parameter is bogus.\r\n\r\n**Code for reproduction**\r\n\r\nEither\r\n\r\n`xtick.alignment : top`\r\n\r\nOr \r\n\r\n`xtick.alignment : left`\r\n\r\nin .matplotlibrc\r\n\r\n`matplotlib.pyplot.plot([1,2,3], [5,3,9])`\r\n\r\nfor provoking the ValueError (see above\r\n\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: Arch Linux\r\n  * Matplotlib version: 3.1.3\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version: 3.8.1\r\n\r\n","author":{"url":"https://github.com/moritzschaefer","@type":"Person","name":"moritzschaefer"},"datePublished":"2020-02-27T10:28:28.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/16583/matplotlib/issues/16583"}