René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"BUG: Setting ticksize xx-small broken by #17348","articleBody":"On commit 9909aeb43474d12e560695db7e3028623906389e this code works fine:\r\n```\r\nimport matplotlib.pyplot as plt\r\nplt.rcParams['xtick.labelsize'] = 'xx-small'\r\nfig, ax = plt.subplots()\r\n```\r\nAfter #17348 (specifically 222b3ba20dd51572ce30526f93fca1fb4329b3ca) I get:\r\n\r\n\u003cdetails\u003e\r\n\u003csummary\u003eTraceback\u003c/summary\u003e\r\n\r\n```\r\n\u003e\u003e\u003e Traceback (most recent call last):\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/fontconfig_pattern.py\", line 127, in parse\r\n    self._parser.parseString(pattern)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1945, in parseString\r\n    raise exc\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1935, in parseString\r\n    loc, tokens = self._parse(instring, 0)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1836, in _parseCache\r\n    value = self._parseNoCache(instring, loc, doActions, callPreParse)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1675, in _parseNoCache\r\n    loc, tokens = self.parseImpl(instring, preloc, doActions)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 4050, in parseImpl\r\n    loc, exprtokens = e._parse(instring, loc, doActions)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1836, in _parseCache\r\n    value = self._parseNoCache(instring, loc, doActions, callPreParse)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1679, in _parseNoCache\r\n    loc, tokens = self.parseImpl(instring, preloc, doActions)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 3796, in parseImpl\r\n    raise ParseException(instring, loc, self.errmsg, self)\r\npyparsing.ParseException: Expected end of text, found '-'  (at char 2), (line:1, col:3)\r\n\r\nThe above exception was the direct cause of the following exception:\r\n\r\nTraceback (most recent call last):\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/backends/backend_qt5.py\", line 471, in _draw_idle\r\n    self.draw()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/backends/backend_agg.py\", line 397, in draw\r\n    self.figure.draw(self.renderer)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/artist.py\", line 41, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/figure.py\", line 1681, in draw\r\n    mimage._draw_list_compositing_images(\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/image.py\", line 132, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/artist.py\", line 41, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/cbook/deprecation.py\", line 410, in wrapper\r\n    return func(*inner_args, **inner_kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axes/_base.py\", line 2747, in draw\r\n    mimage._draw_list_compositing_images(renderer, self, artists)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/image.py\", line 132, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/artist.py\", line 41, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1149, in draw\r\n    ticks_to_draw = self._update_ticks()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1007, in _update_ticks\r\n    major_locs = self.get_majorticklocs()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1268, in get_majorticklocs\r\n    return self.major.locator()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/ticker.py\", line 2169, in __call__\r\n    return self.tick_values(vmin, vmax)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/ticker.py\", line 2177, in tick_values\r\n    locs = self._raw_ticks(vmin, vmax)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/ticker.py\", line 2116, in _raw_ticks\r\n    nbins = np.clip(self.axis.get_tick_space(),\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 2203, in get_tick_space\r\n    size = self._get_tick_label_size('x') * 3\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1328, in _get_tick_label_size\r\n    return mtext.FontProperties(size).get_size_in_points()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/font_manager.py\", line 628, in __init__\r\n    self.set_fontconfig_pattern(family)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/font_manager.py\", line 840, in set_fontconfig_pattern\r\n    for key, val in parse_fontconfig_pattern(pattern).items():\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/fontconfig_pattern.py\", line 129, in parse\r\n    raise ValueError(\r\nValueError: Could not parse font string: 'xx-small'\r\nExpected end of text, found '-'  (at char 2), (line:1, col:3)\r\nTraceback (most recent call last):\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/fontconfig_pattern.py\", line 127, in parse\r\n    self._parser.parseString(pattern)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1945, in parseString\r\n    raise exc\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1935, in parseString\r\n    loc, tokens = self._parse(instring, 0)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1836, in _parseCache\r\n    value = self._parseNoCache(instring, loc, doActions, callPreParse)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1675, in _parseNoCache\r\n    loc, tokens = self.parseImpl(instring, preloc, doActions)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 4050, in parseImpl\r\n    loc, exprtokens = e._parse(instring, loc, doActions)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1836, in _parseCache\r\n    value = self._parseNoCache(instring, loc, doActions, callPreParse)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 1679, in _parseNoCache\r\n    loc, tokens = self.parseImpl(instring, preloc, doActions)\r\n  File \"/home/larsoner/.local/lib/python3.8/site-packages/pyparsing.py\", line 3796, in parseImpl\r\n    raise ParseException(instring, loc, self.errmsg, self)\r\npyparsing.ParseException: Expected end of text, found '-'  (at char 2), (line:1, col:3)\r\n\r\nThe above exception was the direct cause of the following exception:\r\n\r\nTraceback (most recent call last):\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/backends/backend_qt5.py\", line 471, in _draw_idle\r\n    self.draw()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/backends/backend_agg.py\", line 397, in draw\r\n    self.figure.draw(self.renderer)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/artist.py\", line 41, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/figure.py\", line 1681, in draw\r\n    mimage._draw_list_compositing_images(\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/image.py\", line 132, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/artist.py\", line 41, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/cbook/deprecation.py\", line 410, in wrapper\r\n    return func(*inner_args, **inner_kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axes/_base.py\", line 2747, in draw\r\n    mimage._draw_list_compositing_images(renderer, self, artists)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/image.py\", line 132, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/artist.py\", line 41, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1149, in draw\r\n    ticks_to_draw = self._update_ticks()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1007, in _update_ticks\r\n    major_locs = self.get_majorticklocs()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1268, in get_majorticklocs\r\n    return self.major.locator()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/ticker.py\", line 2169, in __call__\r\n    return self.tick_values(vmin, vmax)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/ticker.py\", line 2177, in tick_values\r\n    locs = self._raw_ticks(vmin, vmax)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/ticker.py\", line 2116, in _raw_ticks\r\n    nbins = np.clip(self.axis.get_tick_space(),\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 2203, in get_tick_space\r\n    size = self._get_tick_label_size('x') * 3\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/axis.py\", line 1328, in _get_tick_label_size\r\n    return mtext.FontProperties(size).get_size_in_points()\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/font_manager.py\", line 628, in __init__\r\n    self.set_fontconfig_pattern(family)\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/font_manager.py\", line 840, in set_fontconfig_pattern\r\n    for key, val in parse_fontconfig_pattern(pattern).items():\r\n  File \"/home/larsoner/python/matplotlib/lib/matplotlib/fontconfig_pattern.py\", line 129, in parse\r\n    raise ValueError(\r\nValueError: Could not parse font string: 'xx-small'\r\nExpected end of text, found '-'  (at char 2), (line:1, col:3)\r\n```\r\n\r\n\u003c/details\u003e\r\n\r\ncc author of the PR @QuLogic and committer @timhoffm","author":{"url":"https://github.com/larsoner","@type":"Person","name":"larsoner"},"datePublished":"2020-06-18T16:30:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/17670/matplotlib/issues/17670"}