On 10/01/2010 11:31 AM, Jason Grout wrote:
> I'm working on updating matplotlib in Sage to 1.0. We're running into
> a problem where it seems that the fontList.cache is not being updated.
> I've included an example session below. The .matplotlib directory is
> accessible here:
> http://sage.math.washington.edu/home/jason/.matplotlib/ The problem
> seems to be that it is looking for a file that does not exist:
>
> [ja...@sage:/scratch/jason/sage-4.6.alpha2]$ ls
> /scratch/grout/sage-4.5.3/local/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf
> ls: cannot access
> /scratch/grout/sage-4.5.3/local/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf:
> No such file or directory
>
>
> Does anyone have any idea what is going on? Why is the fontList.cache
> file not being updated, instead of trying to access a path that doesn't
> exist?
There is a fix in SVN for this, but it has not yet been released. When
a font file is not found, it rebuilds the entire font cache on the spot.
> A related question is: I see the variable USE_FONTCONFIG in
> font_manager.py. It says it is experimental. How stable is that code?
> It's tempting to switch to using fontconfig.
I use it as a matter of course on my Linux box and haven't had any
issues. It's experimental because it's the kind of thing that is so
affected by external environmental issues and distro differences. Just
because it "works for me", there's no guarantee it will work
everywhere. But go ahead and give it a try and report back with the
distro you're using.
Mike
> Thanks,
>
> Jason
>
>
> Here is my example session:
>
> In [1]: from pylab import *
>
> In [2]: text(0.5, 0.5, 'text 0')
> Out[2]:<matplotlib.text.Text object at 0x18e7b50>
>
> In [3]: savefig('test.png')
> ERROR: An unexpected error occurred while tokenizing input
> The following traceback may be corrupted or invalid
> The error message is: ('EOF in multi-line statement', (532, 0))
>
> ERROR: An unexpected error occurred while tokenizing input
> The following traceback may be corrupted or invalid
> The error message is: ('EOF in multi-line statement', (643, 0))
>
> ERROR: An unexpected error occurred while tokenizing input
> The following traceback may be corrupted or invalid
> The error message is: ('EOF in multi-line statement', (10, 0))
>
> ---------------------------------------------------------------------------
> RuntimeError Traceback (most recent call last)
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/<ipython console> in<module>()
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/pyplot.pyc
> in savefig(*args, **kwargs)
> 361 def savefig(*args, **kwargs):
> 362 fig = gcf()
> --> 363 return fig.savefig(*args, **kwargs)
> 364
> 365 @docstring.copy_dedent(Figure.ginput)
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/figure.pyc
> in savefig(self, *args, **kwargs)
> 1082 kwargs.setdefault('edgecolor',
> rcParams['savefig.edgecolor'])
> 1083
> -> 1084 self.canvas.print_figure(*args, **kwargs)
> 1085
> 1086 if transparent:
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/backend_bases.pyc
> in print_figure(self, filename, dpi, facecolor, edgecolor, orientation,
> format, **kwargs)
> 1884 orientation=orientation,
> 1885 bbox_inches_restore=_bbox_inches_restore,
> -> 1886 **kwargs)
> 1887 finally:
> 1888 if bbox_inches and restore_bbox:
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc
> in print_png(self, filename_or_obj, *args, **kwargs)
> 436
> 437 def print_png(self, filename_or_obj, *args, **kwargs):
> --> 438 FigureCanvasAgg.draw(self)
> 439 renderer = self.get_renderer()
> 440 original_dpi = renderer.dpi
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc
> in draw(self)
> 392
> 393 self.renderer = self.get_renderer()
> --> 394 self.figure.draw(self.renderer)
> 395
> 396 def get_renderer(self):
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/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
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/figure.pyc
> in draw(self, renderer)
> 796 dsu.sort(key=itemgetter(0))
> 797 for zorder, func, args in dsu:
> --> 798 func(*args)
> 799
> 800 renderer.close_group('figure')
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/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
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/axes.pyc
> in draw(self, renderer, inframe)
> 1932
> 1933 for zorder, a in dsu:
> -> 1934 a.draw(renderer)
> 1935
> 1936 renderer.close_group('axes')
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/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
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/axis.pyc
> in draw(self, renderer, *args, **kwargs)
> 1015 tick.set_label1(label)
> 1016 tick.set_label2(label)
> -> 1017 tick.draw(renderer)
> 1018 if tick.label1On and tick.label1.get_visible():
> 1019 extent = tick.label1.get_window_extent(renderer)
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/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
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/axis.pyc
> in draw(self, renderer)
> 232
> 233 if self.label1On:
> --> 234 self.label1.draw(renderer)
> 235 if self.label2On:
> 236 self.label2.draw(renderer)
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/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
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/text.pyc
> in draw(self, renderer)
> 522 renderer.open_group('text', self.get_gid())
> 523
> --> 524 bbox, info = self._get_layout(renderer)
> 525 trans = self.get_transform()
> 526
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/text.pyc
> in _get_layout(self, renderer)
> 296 tmp, lp_h, lp_bl = get_text_width_height_descent('lp',
> 297
> self._fontproperties,
> --> 298
> ismath=False)
> 299 offsety = lp_h * self._linespacing
> 300
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc
> in get_text_width_height_descent(self, s, prop, ismath)
> 178
> 179 flags = self._get_hinting_flag()
> --> 180 font = self._get_agg_font(prop)
> 181 font.set_text(s, 0.0, flags=flags) # the width and
> height of unrotated string
> 182 w, h = font.get_width_height()
>
> /mnt/usb1/scratch/jason/sage-4.6.alpha2/local/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc
> in _get_agg_font(self, prop)
> 219 font = self._fontd.get(fname)
> 220 if font is None:
> --> 221 font = FT2Font(str(fname))
> 222 self._fontd[fname] = font
> 223 self._fontd[key] = font
>
> RuntimeError: Could not open facefile
> /scratch/grout/sage-4.5.3/local/lib/python2.6/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf;
> Cannot_Open_Resource
>
>
>
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