It looks like something fishy in your font cache -- "None" has been
entered in the table as a filename.
Can you move away your ~/.matplotlib/fontList.cache file (to force a
regeneration) and see if that resolves the problem? If so, I'd like to
see the original broken fontList.cache file to see if I can get to the
bottom of what's wrong with it.
Have you set any font-related rcParams to anything non-standard that
might be causing the lookup to fail?
Cheers,
Mike
On 06/21/2011 04:24 AM, Fernando Perez wrote:
> Howdy,
>
> a simple
>
> plot(rand(100))
> savefig('foo.eps')
>
> is giving me the traceback below. Is it something I'm doing wrong on my side?
>
> Running on linux, ubuntu 10.10, python2.6.
>
> Thanks for any tips...
>
>
> f
>
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
> /home/fperez/research/dif-tx/src/python/<ipython-input-2-3f85c055f45e>
> in<module>()
> ----> 1 savefig('foo.eps')
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/pyplot.pyc
> in savefig(*args, **kwargs)
> 426 def savefig(*args, **kwargs):
> 427 fig = gcf()
> --> 428 return fig.savefig(*args, **kwargs)
> 429
> 430 @docstring.copy_dedent(Figure.ginput)
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/figure.pyc
> in savefig(self, *args, **kwargs)
> 1160 kwargs.setdefault('edgecolor',
> rcParams['savefig.edgecolor'])
> 1161
> -> 1162 self.canvas.print_figure(*args, **kwargs)
> 1163
> 1164 if transparent:
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backends/backend_qt4agg.pyc
> in print_figure(self, *args, **kwargs)
> 151
> 152 def print_figure(self, *args, **kwargs):
> --> 153 FigureCanvasAgg.print_figure(self, *args, **kwargs)
> 154 self.draw()
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backend_bases.pyc
> in print_figure(self, filename, dpi, facecolor, edgecolor,
> orientation, format, **kwargs)
> 1977 orientation=orientation,
> 1978 bbox_inches_restore=_bbox_inches_restore,
> -> 1979 **kwargs)
> 1980 finally:
> 1981 if bbox_inches and restore_bbox:
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backend_bases.pyc
> in print_eps(self, *args, **kwargs)
> 1744 from backends.backend_ps import FigureCanvasPS # lazy import
> 1745 ps = self.switch_backends(FigureCanvasPS)
> -> 1746 return ps.print_eps(*args, **kwargs)
> 1747
> 1748 def print_pdf(self, *args, **kwargs):
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backends/backend_ps.pyc
> in print_eps(self, outfile, *args, **kwargs)
> 933
> 934 def print_eps(self, outfile, *args, **kwargs):
> --> 935 return self._print_ps(outfile, 'eps', *args, **kwargs)
> 936
> 937
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backends/backend_ps.pyc
> in _print_ps(self, outfile, format, *args, **kwargs)
> 966 self._print_figure(outfile, format, imagedpi,
> facecolor, edgecolor,
> 967 orientation, isLandscape, papertype,
> --> 968 **kwargs)
> 969
> 970 def _print_figure(self, outfile, format, dpi=72,
> facecolor='w', edgecolor='w',
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backends/backend_ps.pyc
> in _print_figure(self, outfile, format, dpi, facecolor, edgecolor,
> orientation, isLandscape, papertype, **kwargs)
> 1059 bbox_inches_restore=_bbox_inches_restore)
> 1060
> -> 1061 self.figure.draw(renderer)
> 1062
> 1063 if dryrun: # return immediately if dryrun (tightbbox=True)
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/artist.pyc
> in draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/figure.pyc
> in draw(self, renderer)
> 872 dsu.sort(key=itemgetter(0))
> 873 for zorder, func, args in dsu:
> --> 874 func(*args)
> 875
> 876 renderer.close_group('figure')
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/artist.pyc
> in draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/axes.pyc
> in draw(self, renderer, inframe)
> 1981
> 1982 for zorder, a in dsu:
> -> 1983 a.draw(renderer)
> 1984
> 1985 renderer.close_group('axes')
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/artist.pyc
> in draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/axis.pyc
> in draw(self, renderer, *args, **kwargs)
> 1035
> 1036 ticks_to_draw = self._update_ticks(renderer)
> -> 1037 ticklabelBoxes, ticklabelBoxes2 =
> self._get_tick_bboxes(ticks_to_draw, renderer)
> 1038
> 1039 for tick in ticks_to_draw:
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/axis.pyc
> in _get_tick_bboxes(self, ticks, renderer)
> 986 for tick in ticks:
> 987 if tick.label1On and tick.label1.get_visible():
> --> 988 extent = tick.label1.get_window_extent(renderer)
> 989 ticklabelBoxes.append(extent)
> 990 if tick.label2On and tick.label2.get_visible():
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/text.pyc
> in get_window_extent(self, renderer, dpi)
> 745 raise RuntimeError('Cannot get window extent w/o
> renderer')
> 746
> --> 747 bbox, info = self._get_layout(self._renderer)
> 748 x, y = self.get_position()
> 749 x, y = self.get_transform().transform_point((x, y))
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/text.pyc
> in _get_layout(self, renderer)
> 298 tmp, lp_h, lp_bl = get_text_width_height_descent('lp',
> 299
> self._fontproperties,
> --> 300
> ismath=False)
> 301 offsety = lp_h * self._linespacing
> 302
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backends/backend_ps.pyc
> in get_text_width_height_descent(self, s, prop, ismath)
> 338 if rcParams['ps.useafm']:
> 339 if ismath: s = s[1:-1]
> --> 340 font = self._get_font_afm(prop)
> 341 l,b,w,h,d = font.get_str_bbox_and_descent(s)
> 342
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/backends/backend_ps.pyc
> in _get_font_afm(self, prop)
> 366 font = self.afmfontd.get(key)
> 367 if font is None:
> --> 368 fname = findfont(prop, fontext='afm',
> directory=self._afm_font_dir)
> 369 if fname is None:
> 370 fname = findfont(
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/font_manager.pyc
> in findfont(prop, **kw)
> 1319 def findfont(prop, **kw):
> 1320 global fontManager
> -> 1321 font = fontManager.findfont(prop, **kw)
> 1322 return font
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/font_manager.pyc
> in findfont(self, prop, fontext, directory, fallback_to_default,
> rebuild_if_missing)
> 1211 default_prop = prop.copy()
> 1212 default_prop.set_family(self.defaultFamily[fontext])
> -> 1213 return self.findfont(default_prop, fontext,
> directory, False)
> 1214 else:
> 1215 # This is a hard fail -- we can't find
> anything reasonable,
>
>
> /home/fperez/usr/opt/lib/python2.6/site-packages/matplotlib/font_manager.pyc
> in findfont(self, prop, fontext, directory, fallback_to_default,
> rebuild_if_missing)
> 1226 result = best_font.fname
> 1227
> -> 1228 if not os.path.isfile(result):
> 1229 if rebuild_if_missing:
> 1230 verbose.report(
>
> /usr/lib/python2.6/genericpath.pyc in isfile(path)
> 27 """Test whether a path is a regular file"""
> 28 try:
> ---> 29 st = os.stat(path)
> 30 except os.error:
> 31 return False
>
> TypeError: coercing to Unicode: need string or buffer, NoneType found
>
> ------------------------------------------------------------------------------
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--
Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA
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