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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Repeated warning about fc-list","articleBody":"Since Matplotlib 1.5.1, I see a warning (twice) each time I instantiate a `FontManager()`:\n\n``` python\nIn [2]: from matplotlib.font_manager import FontManager\n\nIn [3]: FontManager()\n/Users/tom/miniconda3/envs/production/lib/python3.4/site-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.\n  warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')\n/Users/tom/miniconda3/envs/production/lib/python3.4/site-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.\n  warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')\nOut[3]: \u003cmatplotlib.font_manager.FontManager at 0x1057b6630\u003e\n\nIn [4]: FontManager()\n/Users/tom/miniconda3/envs/production/lib/python3.4/site-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.\n  warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')\n/Users/tom/miniconda3/envs/production/lib/python3.4/site-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.\n  warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')\nOut[4]: \u003cmatplotlib.font_manager.FontManager at 0x1064d4ba8\u003e\n```\n\nThis did not happen with 1.5.0. There's two issues here - the warning is repeated twice at each call, which indicates that the command is being run twice (inefficient), and the warning is being shown at all - why does `fc-list` need to be run every time `FontManager` is run? Even if there is a good reason for it to run, I'm not sure if a warning is necessary?\n","author":{"url":"https://github.com/astrofrog","@type":"Person","name":"astrofrog"},"datePublished":"2016-01-12T10:18:24.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":66},"url":"https://github.com/5836/matplotlib/issues/5836"}