matplotlib-users

[Matplotlib-users] Repeated calls to set_text using TeX formatting results in RuntimeError

[<Bri...@ub...>]

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Re: [Matplotlib-users] Repeated calls to set_text using TeX formatting results in RuntimeError

[Michael D. <md...@st...>]

I believe this is a known bug with 0.90.1.  Are you able to run 0.91.1?

Cheers,
Mike

Bri...@ub... wrote:
> I'm doing a parameter fitting exercise, and plotting the progress as I 
> do so.  I have found that repeated calls to set_text() on a text object 
> will result in an error opening a font file iff the text uses TeX 
> formatting.  (I am not using the experimental usetex feature).
> 
> I speculate that matplotlib is opening the font file anew with each call 
> to set_text and never closing it, resulting ultimately in having too 
> many files open.  Here is a brief program to reproduce this behavior  
> (WinXP, Py2.5, matplotlib 0.90.1):
> 
> 
> from pylab import figure, axes, draw, ion
> from numpy import array, cos, abs
> ion()
> fig=figure()
> axs=axes()
> x=array(range(100))/10.0
> cosPlot=axs.plot( x, cos(x)**2, 'r' )
> powText = axs.text(0.9,0.02,r'$\alpha=$',
>                     horizontalalignment='left',verticalalignment='bottom',
>                     transform = axs.transAxes)
> draw()
> for alpha in array(range(10,400))/100.0:
>     axs.lines[-1].set_ydata( abs(cos(x))**alpha)
>     powText.set_text(r'$\alpha=%.4g$'%alpha)
>     print alpha
>     draw()
>    
> 
> 
> 
> 
> Traceback (most recent call last):
>   File "delme.py", line 16, in <module>
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\pylab.py", 
> line 754, in draw
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\backends\backend_tkagg.py", 
> line 154, in draw
> 
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\backends\backend_agg.py", 
> line 392, in draw
> 
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\figure.py", 
> line 601, in draw
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\axes.py", 
> line 1286, in draw
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\text.py", 
> line 410, in draw
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\text.py", 
> line 255, in _get_layout
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\backends\backend_agg.py", 
> line 246, in get_text_width_height
> 
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\mathtext.py", 
> line 1569, in __call__
>   File 
> "C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\mathtext.py", 
> line 578, in __init__
> RuntimeError: Could not open facefile 
> c:\Python25\lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplotlib\mpl-data\fonts\ttf\cmtt10.ttf; 
> Cannot_Open_Resource
> 
> 
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

Re: [Matplotlib-users] Repeated calls to set_text using TeX formatting results in RuntimeError

[John H. <jd...@gm...>]

On Dec 11, 2007 8:17 AM, Michael Droettboom <md...@st...> wrote:
> I believe this is a known bug with 0.90.1.  Are you able to run 0.91.1?

If I am reading this right, according to the svn log, you fixed this in

  r4633 | mdboom | 2007-12-05 14:28:28 -0600 (Wed, 05 Dec 2007) | 2 lines

  Fix bug where font files were opened many more times than they need to be.

and 0.91.1 was released at r4517.  So this fix may not be out until
the 0.91.2 point release.  Or were you referring to a different fix?

JDH

Re: [Matplotlib-users] Repeated calls to set_text using TeX formatting results in RuntimeError

[Michael D. <md...@st...>]

This bug is that many font files were being opened than needed, but they 
were still all getting closed.

Much earlier, someone else fixed a bug where they weren't getting closed 
at all.

http://sourceforge.net/tracker/index.php?func=detail&aid=1695171&group_id=80706&atid=560720
http://sourceforge.net/tracker/index.php?func=detail&aid=1715662&group_id=80706&atid=560720

Cheers,
Mike

John Hunter wrote:
> On Dec 11, 2007 8:17 AM, Michael Droettboom <md...@st...> wrote:
>> I believe this is a known bug with 0.90.1.  Are you able to run 0.91.1?
> 
> If I am reading this right, according to the svn log, you fixed this in
> 
>   r4633 | mdboom | 2007-12-05 14:28:28 -0600 (Wed, 05 Dec 2007) | 2 lines
> 
>   Fix bug where font files were opened many more times than they need to be.
> 
> and 0.91.1 was released at r4517.  So this fix may not be out until
> the 0.91.2 point release.  Or were you referring to a different fix?
> 
> JDH

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA