Thread: [Matplotlib-users] Error on matplotlib with the hist() method [ archlinux ]

Hello, Im running the last matplotlib version.
I just want to plot an histogram. Here is the complete backtrace, complaining 
about the Vera.ttf font missing :
Any idea ?
Traceback (most recent call last):
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_gtk.py", 
line 393, in expose_event
 self._render_figure(self._pixmap, w, h)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_gtkagg.py", 
line 75, in _render_figure
 FigureCanvasAgg.draw(self)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", 
line 394, in draw
 self.figure.draw(self.renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/figure.py", line 798, in draw
 func(*args)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/axes.py", line 1934, in draw
 a.draw(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/axis.py", line 1017, in draw
 tick.draw(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/axis.py", line 234, in draw
 self.label1.draw(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/text.py", line 524, in draw
 bbox, info = self._get_layout(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/text.py", line 298, in 
_get_layout
 ismath=False)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", 
line 180, in get_text_width_height_descent
 font = self._get_agg_font(prop)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", 
line 221, in _get_agg_font
 font = FT2Font(str(fname))
RuntimeError: Could not open facefile /usr/lib/python2.6/site-
packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf; Cannot_Open_Resource
Traceback (most recent call last):
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_gtk.py", 
line 393, in expose_event
 self._render_figure(self._pixmap, w, h)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_gtkagg.py", 
line 75, in _render_figure
 FigureCanvasAgg.draw(self)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", 
line 394, in draw
 self.figure.draw(self.renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/figure.py", line 798, in draw
 func(*args)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/axes.py", line 1934, in draw
 a.draw(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/axis.py", line 1017, in draw
 tick.draw(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/axis.py", line 234, in draw
 self.label1.draw(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/artist.py", line 55, in 
draw_wrapper
 draw(artist, renderer, *args, **kwargs)
 File "/usr/lib/python2.7/site-packages/matplotlib/text.py", line 524, in draw
 bbox, info = self._get_layout(renderer)
 File "/usr/lib/python2.7/site-packages/matplotlib/text.py", line 298, in 
_get_layout
 ismath=False)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", 
line 180, in get_text_width_height_descent
 font = self._get_agg_font(prop)
 File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", 
line 221, in _get_agg_font
 font = FT2Font(str(fname))
RuntimeError: Could not open facefile /usr/lib/python2.6/site-
packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf; Cannot_Open_Resource

On 2010年10月31日, David Kremer wrote:
> File "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py",
python 2.7 ^^
> RuntimeError: Could not open facefile /usr/lib/python2.6/site-
> packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf; Cannot_Open_Resource
python 2.6 ^^
I believe this problem is fixed in the next matplotlib release. A 
workaround is to remove a local font cache file:
rm ~/.matplotlib/fontList.cache
HTH,
daryl

> On 2010年10月31日, David Kremer wrote:
> > File
> > "/usr/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py",
> 
> python 2.7 ^^
> 
> > RuntimeError: Could not open facefile /usr/lib/python2.6/site-
> > packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf; Cannot_Open_Resource
> 
> python 2.6 ^^
> 
> I believe this problem is fixed in the next matplotlib release. A
> workaround is to remove a local font cache file:
> 
> rm ~/.matplotlib/fontList.cache
> 
> HTH,
> daryl
It worked. Thank you.
I also did a symbolic link, but your method worked, so I deleted it.
Thank you.
David