René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PGF backend (LaTeX) on macOS: font-not-found","articleBody":"With default parameters the script fails to write the pgf file to disk. Running the script triggers an exception (see code block and message below). Setting ```pgf.rcfonts``` to ```False``` fixes the issue for me, but the parameter is set to ```True``` by default.\r\n\r\nMaybe related: https://github.com/matplotlib/matplotlib/issues/2097\r\n\r\n**Code for reproduction**\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport matplotlib as mpl\r\n\r\n# remove or set to True (default) to trigger exception\r\nrc_xelatex = {'pgf.rcfonts': False} \r\nmpl.rcParams.update(rc_xelatex)\r\n\r\nplt.plot([1, 2, 3, 4], label=\"$test$\")  # adding latex label\r\nplt.legend(loc='right')  # add to plot\r\nplt.show()  # works\r\nplt.savefig(\"latex_pyplot.pdf\")  # works\r\nplt.savefig(\"latex_pyplot.pgf\")  # exception if pgf.rcfonts is True\r\n```\r\n\r\n**Terminal output**\r\n\r\n```Terminal\r\nkpathsea:make_tex: Invalid fontname `Bitstream Vera Serif', contains ' '\r\nTraceback (most recent call last):\r\n  File \"latex_pyplot.py\", line 16, in \u003cmodule\u003e\r\n    plt.savefig(\"latex_pyplot.pgf\")  # exception if pgf.rcfonts is True\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/pyplot.py\", line 710, in savefig\r\n    res = fig.savefig(*args, **kwargs)\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/figure.py\", line 1883, in savefig\r\n    self.canvas.print_figure(fname, **kwargs)\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/backend_bases.py\", line 2261, in print_figure\r\n    **kwargs)\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/backends/backend_pgf.py\", line 834, in print_pgf\r\n    self._print_pgf_to_fh(fh, *args, **kwargs)\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/backends/backend_pgf.py\", line 813, in _print_pgf_to_fh\r\n    RendererPgf(self.figure, fh),\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/backends/backend_pgf.py\", line 417, in __init__\r\n    self.latexManager = LatexManagerFactory.get_latex_manager()\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/backends/backend_pgf.py\", line 229, in get_latex_manager\r\n    new_inst = LatexManager()\r\n  File \"/Users/jens/dev/matplotlib/lib/matplotlib/backends/backend_pgf.py\", line 313, in __init__\r\n    raise LatexError(\"LaTeX returned an error, probably missing font or error in preamble:\\n%s\" % stdout)\r\nmatplotlib.backends.backend_pgf.LatexError: LaTeX returned an error, probably missing font or error in preamble:\r\nThis is XeTeX, Version 3.14159265-2.6-0.99998 (TeX Live 2017) (preloaded format=xelatex)\r\n restricted \\write18 enabled.\r\n**entering extended mode\r\nLaTeX2e \u003c2017-04-15\u003e\r\nBabel \u003c3.16\u003e and hyphenation patterns for 84 language(s) loaded.\r\n\r\n*(/usr/local/texlive/2017/texmf-dist/tex/latex/base/minimal.cls\r\nDocument Class: minimal 2001/05/25 Standard LaTeX minimal class\r\n)\r\n(Please type a command or say `\\end')\r\n*\r\n*(/usr/local/texlive/2017/texmf-dist/tex/latex/fontspec/fontspec.sty\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/l3packages/xparse/xparse.sty\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/l3kernel/expl3.sty\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/l3kernel/expl3-code.tex)\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/l3kernel/l3xdvipdfmx.def)))\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/fontspec/fontspec-xetex.sty\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/base/fontenc.sty\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/base/tuenc.def))\r\n(/usr/local/texlive/2017/texmf-dist/tex/latex/fontspec/fontspec.cfg)))\r\n\r\n!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\r\n!\r\n! fontspec error: \"font-not-found\"\r\n! \r\n! The font \"Bitstream Vera Serif\" cannot be found.\r\n! \r\n! See the fontspec documentation for further information.\r\n! \r\n! For immediate help type H \u003creturn\u003e.\r\n!...............................................\r\n                         \r\n\u003c*\u003e \\setmainfont{Bitstream Vera Serif}\r\n\r\nNo pages of output.\r\nTranscript written on texput.log.\r\n```\r\n\r\n**fc-list**\r\n\r\n```\r\n...\r\n/opt/X11/share/fonts/TTF/VeraMoBI.ttf: Bitstream Vera Sans Mono:style=Bold Oblique\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraIt.ttf: Bitstream Vera Sans:style=Oblique\r\n/opt/X11/share/fonts/TTF/Vera.ttf: Bitstream Vera Sans:style=Roman\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraMoBd.ttf: Bitstream Vera Sans Mono:style=Bold\r\n/opt/X11/share/fonts/TTF/VeraMoIt.ttf: Bitstream Vera Sans Mono:style=Oblique\r\n/opt/X11/share/fonts/TTF/VeraSe.ttf: Bitstream Vera Serif:style=Roman\r\n/opt/X11/share/fonts/TTF/VeraMono.ttf: Bitstream Vera Sans Mono:style=Roman\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraSe.ttf: Bitstream Vera Serif:style=Roman\r\n/opt/X11/share/fonts/TTF/VeraIt.ttf: Bitstream Vera Sans:style=Oblique\r\n/usr/X11R6/lib/X11/fonts/TTF/Vera.ttf: Bitstream Vera Sans:style=Roman\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraMoBI.ttf: Bitstream Vera Sans Mono:style=Bold Oblique\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraBI.ttf: Bitstream Vera Sans:style=Bold Oblique\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraMono.ttf: Bitstream Vera Sans Mono:style=Roman\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraBd.ttf: Bitstream Vera Sans:style=Bold\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraSeBd.ttf: Bitstream Vera Serif:style=Bold\r\n/opt/X11/share/fonts/TTF/VeraBd.ttf: Bitstream Vera Sans:style=Bold\r\n/opt/X11/share/fonts/TTF/VeraSeBd.ttf: Bitstream Vera Serif:style=Bold\r\n/opt/X11/share/fonts/TTF/VeraMoBd.ttf: Bitstream Vera Sans Mono:style=Bold\r\n/opt/X11/share/fonts/TTF/VeraBI.ttf: Bitstream Vera Sans:style=Bold Oblique\r\n/usr/X11R6/lib/X11/fonts/TTF/VeraMoIt.ttf: Bitstream Vera Sans Mono:style=Oblique\r\n...\r\n```\r\n\r\n\r\n**Matplotlib version**\r\n  * Operating system: macOS 12.13 High Sierra\r\n  * Matplotlib version: Matplotlib 2.1.1 (Anaconda default) and master branch bd75712cd7f11f5ac9da57637dcbdefe821fbbb2\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): MacOSX\r\n  * Python version: 2.7.14 (Anaconda)","author":{"url":"https://github.com/laborleben","@type":"Person","name":"laborleben"},"datePublished":"2018-01-23T22:53:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":14},"url":"https://github.com/10307/matplotlib/issues/10307"}