Ok thank you - so one way to work around it is to just generate the files I
want in batches so Windows won't run out of file handles - but is there a
way to know how many handles are available? I'm trying to animate some data
and I don't really know how many frames there are - could be thousands.
Andy
On Fri, Mar 23, 2012 at 3:45 PM, Michael Droettboom <md...@stsci.edu> wrote:
> 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
> listMatplotlib-users@lists.sourceforge.nethttps://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
>
>
------------------------------------------------------------------------------
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
