This is a known bug on Windows where it runs out of file handles after a
while.
This commit was an attempt to fix it, but it doesn't seem to work:
https://github.com/matplotlib/matplotlib/commit/4cb2aaa87b0aa9efe7178d7510d3d091ef5206df
I think we need a Windows user/developer/expert to get to the bottom of
why file handles are not being freed to the OS.
Mike
On 03/23/2012 04:35 PM, Andrew Smart wrote:
Hi,
I'm running into this RuntimeError: Could not open facefile
c:\Python32\lib\site-packages\matplotlib\mpl-data\fonts\ttf\Vera.ttf;
Cannot_Open_Resource when I'm trying to save out a series of *.png
files in a loop. It crashes on this error after many passes through
the loop and successful files get created, but then always on the same
pass it does this. The full traceback is here:
File
"C:\Users\E440710\Desktop\PythonTransfer\fittslaw_ThroughputCalc_AS_break.py",
line 744, in <module>
fig.savefig(fname, transparent = True)
File "c:\Python32\lib\site-packages\matplotlib\figure.py", line
1174, in savefig
self.canvas.print_figure(*args, **kwargs)
File "c:\Python32\lib\site-packages\matplotlib\backend_bases.py",
line 2027, in print_figure
**kwargs)
File
"c:\Python32\lib\site-packages\matplotlib\backends\backend_agg.py",
line 451, in print_png
FigureCanvasAgg.draw(self)
File
"c:\Python32\lib\site-packages\matplotlib\backends\backend_agg.py",
line 400, in draw
self.figure.draw(self.renderer)
File "c:\Python32\lib\site-packages\matplotlib\artist.py", line 56,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "c:\Python32\lib\site-packages\matplotlib\figure.py", line 887,
in draw
func(*args)
File "c:\Python32\lib\site-packages\matplotlib\artist.py", line 56,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "c:\Python32\lib\site-packages\matplotlib\axes.py", line 1985,
in draw
a.draw(renderer)
File "c:\Python32\lib\site-packages\matplotlib\artist.py", line 56,
in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File "c:\Python32\lib\site-packages\matplotlib\axis.py", line 1043,
in draw
ticklabelBoxes, ticklabelBoxes2 =
self._get_tick_bboxes(ticks_to_draw, renderer)
File "c:\Python32\lib\site-packages\matplotlib\axis.py", line 994,
in _get_tick_bboxes
extent = tick.label1.get_window_extent(renderer)
File "c:\Python32\lib\site-packages\matplotlib\text.py", line 743,
in get_window_extent
bbox, info = self._get_layout(self._renderer)
File "c:\Python32\lib\site-packages\matplotlib\text.py", line 296,
in _get_layout
ismath=False)
File
"c:\Python32\lib\site-packages\matplotlib\backends\backend_agg.py",
line 182, in get_text_width_height_descent
font = self._get_agg_font(prop)
File
"c:\Python32\lib\site-packages\matplotlib\backends\backend_agg.py",
line 223, in _get_agg_font
font = FT2Font(str(fname))
RuntimeError: Could not open facefile
c:\Python32\lib\site-packages\matplotlib\mpl-data\fonts\ttf\Vera.ttf;
Cannot_Open_Resource
I've tried the various fixes that have been suggested - removing the
fontList.py3k.cache and even the removing the .matplotlib directory.
However when I run my script that's producing the error the directory
gets recreated along with the fontList.py3k.cache which must be
pointing to the wrong path?
When I check the path
c:\Python32\lib\site-packages\matplotlib\mpl-data\fonts\ttf\Vera.ttf
where matplotlib is looking for the resource it cannot open - the
Vera.ttf is there.
This only happens after many iterations through the loop that is
saving out the *.png files and I have no idea why.
The relevant code from my script is here:
for p in plotData[k]["data"]:
#print("p in plotData[k]:",p)
a = numpy.array((loc[0],loc[1]))
b = numpy.array((p[0],p[1]))
distValue = (numpy.sqrt(numpy.sum((a-b)**2) ))/86.0
#divide by 86 because that was the ppi on the display used to collect
the data
if p[2] == 1:
hit_x.append(loc[0]-p[0])
hit_y.append(loc[1]-p[1])
frame_hit_x = loc[0]-p[0]
frame_hit_y = loc[1]-p[1]
print("frame_x:", frame_hit_x)
files = []
if size == (0.25,0.25) and makeMovie:
fig = plt.figure()
print("fig:", fig)
plt.plot(frame_hit_x,frame_hit_y,color='green',marker='o',linestyle='')
plt.axis('scaled')
plt.axis([-100,100,-100,100])
fname =
"subj{:g}_size{:g}_hit_x{:g}.png".format(Subject,btnSize,frame_hit_x)
print('saving frame', fname)
fig.savefig(fname, transparent = True)
files.append(fname)
I'm on a Win7 64bit using python 3.2 and matplotlib version 1.2.x
Any help would be greatly appreciated!
Andy
------------------------------------------------------------------------------
This SF email is sponsosred by:
Try Windows Azure free for 90 days Click Here
http://p.sf.net/sfu/sfd2d-msazure
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
------------------------------------------------------------------------------
This SF email is sponsosred by:
Try Windows Azure free for 90 days Click Here
http://p.sf.net/sfu/sfd2d-msazure
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
