René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"savefig to vector graphics with LaTeX fails with certain characters","articleBody":"Saving vector graphic figures with certain characters in LaTeX will fail. Here I tried to use the `\\textmu` character. Could it be related to #8068?\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required--\u003e\r\n\r\nHere I'm saving to PostScript. It gives an error that I think is the most informative and points to some problems with ghostscript. Outputs for SVG and PDF below.\r\n\r\n```python\r\nimport matplotlib\r\nmatplotlib.rcParams['text.usetex'] = True\r\nimport matplotlib.pyplot as plt\r\n\r\nfig = plt.figure()\r\nax = fig.add_subplot(111)\r\nax.set_ylabel(r'\\textmu')\r\nplt.savefig('fig.ps')\r\n```\r\n\r\n**Output - PS**\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\nTraceback (most recent call last):\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_ps.py\", line 1520, in gs_distill\r\n    report = subprocess.check_output(command, stderr=subprocess.STDOUT)\r\n  File \"/usr/lib/python3.6/subprocess.py\", line 336, in check_output\r\n    **kwargs).stdout\r\n  File \"/usr/lib/python3.6/subprocess.py\", line 418, in run\r\n    output=stdout, stderr=stderr)\r\nsubprocess.CalledProcessError: Command '['gs', '-dBATCH', '-dNOPAUSE', '-r6000', '-sDEVICE=ps2write', '-sPAPERSIZE=letter', '-sOutputFile=/tmp/tmpt8w23igm.ps', '/tmp/tmpt8w23igm']' returned non-zero exit status 1.\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nTraceback (most recent call last):\r\n  File \"Untitled.py\", line 8, in \u003cmodule\u003e\r\n    plt.savefig('fig.ps')\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/pyplot.py\", line 701, in savefig\r\n    res = fig.savefig(*args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/figure.py\", line 1834, in savefig\r\n    self.canvas.print_figure(fname, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backend_bases.py\", line 2267, in print_figure\r\n    **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_ps.py\", line 910, in print_ps\r\n    return self._print_ps(outfile, 'ps', *args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_ps.py\", line 937, in _print_ps\r\n    **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_ps.py\", line 1359, in _print_figure_tex\r\n    rotated=psfrag_rotated)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_ps.py\", line 1525, in gs_distill\r\n    '\\n\\n' % exc.output.decode(\"utf-8\")))\r\nRuntimeError: ghostscript was not able to process your image.\r\nHere is the full report generated by ghostscript:\r\nGPL Ghostscript 9.22 (2017-10-04)\r\nCopyright (C) 2017 Artifex Software, Inc.  All rights reserved.\r\nThis software comes with NO WARRANTY: see the file PUBLIC for details.\r\nError: /undefined in --get--\r\nOperand stack:\r\n   --nostringval--   --dict:9/18(ro)(L)--   112   --dict:13/13(L)--   --dict:13/13(L)--   base\r\nExecution stack:\r\n   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   2015   1   3   %oparray_pop   2014   1   3   %oparray_pop   1998   1   3   %oparray_pop   1884   1   3   %oparray_pop   --nostringval--   %errorexec_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   %finish_stringwidth   --nostringval--   --nostringval--   14   8   0   --nostringval--   (pdf_text_enum_t)   %op_show_continue   --nostringval--\r\nDictionary stack:\r\n   --dict:986/1684(ro)(G)--   --dict:1/20(G)--   --dict:82/200(L)--   --dict:5/6(ro)(L)--   --dict:180/300(L)--   --dict:44/200(L)--   --dict:8/17(L)--   --dict:51/90(L)--\r\nCurrent allocation mode is local\r\nLast OS error: No such file or directory\r\nCurrent file position is 58919\r\nGPL Ghostscript 9.22: Unrecoverable error, exit code 1\r\n```\r\n\r\n**Output - SVG, PDF**\r\n\r\n```\r\nTraceback (most recent call last):\r\n  File \"Untitled.py\", line 8, in \u003cmodule\u003e\r\n    plt.savefig('fig.svg')\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/pyplot.py\", line 701, in savefig\r\n    res = fig.savefig(*args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/figure.py\", line 1834, in savefig\r\n    self.canvas.print_figure(fname, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backend_bases.py\", line 2267, in print_figure\r\n    **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_svg.py\", line 1193, in print_svg\r\n    return self._print_svg(filename, svgwriter, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_svg.py\", line 1248, in _print_svg\r\n    self.figure.draw(renderer)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/artist.py\", line 55, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/figure.py\", line 1299, in draw\r\n    renderer, self, artists, self.suppressComposite)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/image.py\", line 138, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/artist.py\", line 55, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/axes/_base.py\", line 2437, in draw\r\n    mimage._draw_list_compositing_images(renderer, self, artists)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/image.py\", line 138, in _draw_list_compositing_images\r\n    a.draw(renderer)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/artist.py\", line 55, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/axis.py\", line 1147, in draw\r\n    self.label.draw(renderer)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/artist.py\", line 55, in draw_wrapper\r\n    return draw(artist, renderer, *args, **kwargs)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/text.py\", line 762, in draw\r\n    mtext=mtext)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_svg.py\", line 1150, in draw_tex\r\n    self._draw_text_as_path(gc, x, y, s, prop, angle, ismath=\"TeX\")\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/backends/backend_svg.py\", line 950, in _draw_text_as_path\r\n    return_new_glyphs_only=True)\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/textpath.py\", line 335, in get_glyphs_tex\r\n    font_bunch = self.tex_font_map[dvifont.texname]\r\n  File \"/home/mirek/.local/lib/python3.6/site-packages/matplotlib/dviread.py\", line 850, in __getitem__\r\n    result = self._font[texname]\r\nKeyError: b'tcss3583'\r\n```\r\nFor PDF it's nearly identical; the last line reads: \r\n```\r\nKeyError: b'tcss1000'\r\n```\r\n\r\nIn case of PS and SVG, no file is produced. In case of PDF, a corrupted file results. Saving to raster formats and inline previews in jupyter notebook work fine.\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: Debian 10\r\n  * Matplotlib version: 2.1.1\r\n  * Python version: 3.6.4\r\n\r\nMatplotlib from pip. Both Matplotlib and LaTeX are installed in userspace\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/miromarszal","@type":"Person","name":"miromarszal"},"datePublished":"2018-01-20T18:20:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/10272/matplotlib/issues/10272"}