Repeated calls to set_text using TeX formatting results in RuntimeError

Community matplotlib-users
1

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

0.91.1?

I just upgraded and checked -- the bug still exists in 0.91.1. I'm
afraid I don't know whether it has been fixed by r4633 or not.

Best,
   Brian

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',

···

Brian.Boonstra@...1809... wrote:

                    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\matpl
otlib\pylab.py",
line 754, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\backends\backend_tkagg.py",
line 154, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\backends\backend_agg.py",
line 392, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\figure.py",
line 601, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\axes.py",
line 1286, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\text.py",
line 410, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\text.py",
line 255, in _get_layout
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\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\matpl
otlib\mathtext.py",
line 1569, in __call__
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\mathtext.py",
line 578, in __init__
RuntimeError: Could not open facefile
c:\Python25\lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplo
tlib\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

This message contains confidential information and is intended only
for the individual named. If you are not the named addressee you
should not disseminate, distribute or copy this e-mail. Please
notify the sender immediately by e-mail if you have received this
e-mail by mistake and delete this e-mail from your system and destroy
any copies thereof.

E-mail transmission cannot be guaranteed to be secure or error-free
as information could be intercepted, corrupted, lost, destroyed,
arrive late or incomplete, or contain viruses. The sender therefore
does not accept liability for any errors or omissions in the contents
of this message which arise as a result of e-mail transmission. If
verification is required please request a hard-copy version. This
message is provided for informational purposes and should not be
construed as a solicitation or offer to buy or sell any securities or
related financial instruments.

2

The patch for r4633 is pretty simple, so you could test it without needing to check out from SVN or build your own matplotlib etc.

Open the file "font_manager.py", which should live in "%PYTHONPATH%/Lib/site-packages/matplotlib". Around line 681, you'll find the function:

     def __hash__(self):
         return hash(repr(self.__props))

Change it to:

     def __hash__(self):
         return hash(repr(self.__props.__dict__))

(Obviously, back up the file first...)

Then try your script again. If that doesn't work, I'll have to fire up Windows some time to have a look -- I'm not able to reproduce this bug on Linux.

Cheers,
Mike

···

Brian.Boonstra@...1809... wrote:

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

0.91.1?

I just upgraded and checked -- the bug still exists in 0.91.1. I'm
afraid I don't know whether it has been fixed by r4633 or not.

Best,
   Brian

Brian.Boonstra@...1809... 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\matpl
otlib\pylab.py",
line 754, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\backends\backend_tkagg.py",
line 154, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\backends\backend_agg.py",
line 392, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\figure.py",
line 601, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\axes.py",
line 1286, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\text.py",
line 410, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\text.py",
line 255, in _get_layout
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\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\matpl
otlib\mathtext.py",
line 1569, in __call__
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
otlib\mathtext.py",
line 578, in __init__
RuntimeError: Could not open facefile c:\Python25\lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matplo
tlib\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

This message contains confidential information and is intended only
for the individual named. If you are not the named addressee you
should not disseminate, distribute or copy this e-mail. Please
notify the sender immediately by e-mail if you have received this
e-mail by mistake and delete this e-mail from your system and destroy any copies thereof.

E-mail transmission cannot be guaranteed to be secure or error-free
as information could be intercepted, corrupted, lost, destroyed,
arrive late or incomplete, or contain viruses. The sender therefore
does not accept liability for any errors or omissions in the contents
of this message which arise as a result of e-mail transmission. If
verification is required please request a hard-copy version. This
message is provided for informational purposes and should not be
construed as a solicitation or offer to buy or sell any securities or
related financial instruments.

-------------------------------------------------------------------------
SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace.
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just about anything Open Source.
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_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
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--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

3

Michael et al.

  The r4633 patch fixes the problem indeed. Thanks for your help!!

Brian

···

-----Original Message-----
From: Michael Droettboom [mailto:mdroe@…86…]
Sent: Tuesday, December 11, 2007 10:03 AM
To: Boonstra, Brian
Cc: matplotlib-users@lists.sourceforge.net
Subject: Re: [Matplotlib-users] Repeated calls to set_text using TeX
formatting results in RuntimeError

The patch for r4633 is pretty simple, so you could test it without
needing to check out from SVN or build your own matplotlib etc.

Open the file "font_manager.py", which should live in
"%PYTHONPATH%/Lib/site-packages/matplotlib". Around line 681, you'll
find the function:

     def __hash__(self):
         return hash(repr(self.__props))

Change it to:

     def __hash__(self):
         return hash(repr(self.__props.__dict__))

(Obviously, back up the file first...)

Then try your script again. If that doesn't work, I'll have to fire up
Windows some time to have a look -- I'm not able to reproduce this bug
on Linux.

Cheers,
Mike

Brian.Boonstra@...1809... wrote:

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

0.91.1?

I just upgraded and checked -- the bug still exists in 0.91.1. I'm
afraid I don't know whether it has been fixed by r4633 or not.

Best,
   Brian

Brian.Boonstra@...1809... 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\matp
l
otlib\pylab.py",
line 754, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\backends\backend_tkagg.py",
line 154, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\backends\backend_agg.py",
line 392, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\figure.py",
line 601, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\axes.py",
line 1286, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\text.py",
line 410, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\text.py",
line 255, in _get_layout
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\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\matp
l
otlib\mathtext.py",
line 1569, in __call__
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\mathtext.py",
line 578, in __init__
RuntimeError: Could not open facefile
c:\Python25\lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
o
tlib\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

This message contains confidential information and is intended only
for the individual named. If you are not the named addressee you
should not disseminate, distribute or copy this e-mail. Please notify

the sender immediately by e-mail if you have received this e-mail by
mistake and delete this e-mail from your system and destroy any copies

thereof.

E-mail transmission cannot be guaranteed to be secure or error-free as

information could be intercepted, corrupted, lost, destroyed, arrive
late or incomplete, or contain viruses. The sender therefore does not

accept liability for any errors or omissions in the contents of this
message which arise as a result of e-mail transmission. If
verification is required please request a hard-copy version. This
message is provided for informational purposes and should not be
construed as a solicitation or offer to buy or sell any securities or
related financial instruments.

----------------------------------------------------------------------
---
SF.Net email is sponsored by:
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for just about anything
Open Source.
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_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

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

This message contains confidential information and is intended only
for the individual named. If you are not the named addressee you
should not disseminate, distribute or copy this e-mail. Please
notify the sender immediately by e-mail if you have received this
e-mail by mistake and delete this e-mail from your system and destroy
any copies thereof.

E-mail transmission cannot be guaranteed to be secure or error-free
as information could be intercepted, corrupted, lost, destroyed,
arrive late or incomplete, or contain viruses. The sender therefore
does not accept liability for any errors or omissions in the contents
of this message which arise as a result of e-mail transmission. If
verification is required please request a hard-copy version. This
message is provided for informational purposes and should not be
construed as a solicitation or offer to buy or sell any securities or
related financial instruments.

4

Great. The forthcoming 0.91.2 release sounds like it will be very important to Windows users.

Apologies for introducing this bug in the first place!

Cheers,
Mike

···

Brian.Boonstra@...1809... wrote:

Michael et al.

  The r4633 patch fixes the problem indeed. Thanks for your help!!

Brian

-----Original Message-----
From: Michael Droettboom [mailto:mdroe@…86…] Sent: Tuesday, December 11, 2007 10:03 AM
To: Boonstra, Brian
Cc: matplotlib-users@lists.sourceforge.net
Subject: Re: [Matplotlib-users] Repeated calls to set_text using TeX
formatting results in RuntimeError

The patch for r4633 is pretty simple, so you could test it without
needing to check out from SVN or build your own matplotlib etc.

Open the file "font_manager.py", which should live in
"%PYTHONPATH%/Lib/site-packages/matplotlib". Around line 681, you'll
find the function:

     def __hash__(self):
         return hash(repr(self.__props))

Change it to:

     def __hash__(self):
         return hash(repr(self.__props.__dict__))

(Obviously, back up the file first...)

Then try your script again. If that doesn't work, I'll have to fire up
Windows some time to have a look -- I'm not able to reproduce this bug
on Linux.

Cheers,
Mike

Brian.Boonstra@...1809... wrote:

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

0.91.1?

I just upgraded and checked -- the bug still exists in 0.91.1. I'm afraid I don't know whether it has been fixed by r4633 or not.

Best,
   Brian

Brian.Boonstra@...1809... 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\matp
l
otlib\pylab.py",
line 754, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\backends\backend_tkagg.py",
line 154, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\backends\backend_agg.py",
line 392, in draw

  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\figure.py",
line 601, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\axes.py",
line 1286, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\text.py",
line 410, in draw
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\text.py",
line 255, in _get_layout
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\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\matp
l
otlib\mathtext.py",
line 1569, in __call__
  File
"C:\Python25\Lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matp
l
otlib\mathtext.py",
line 578, in __init__
RuntimeError: Could not open facefile c:\Python25\lib\site-packages\matplotlib-0.90.1-py2.5-win32.egg\matpl
o
tlib\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

This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify

the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system and destroy any copies

thereof.

E-mail transmission cannot be guaranteed to be secure or error-free as

information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not

accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments.

----------------------------------------------------------------------
---
SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for just about anything Open Source.
http://sourceforge.net/services/buy/index.php
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

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

This message contains confidential information and is intended only
for the individual named. If you are not the named addressee you
should not disseminate, distribute or copy this e-mail. Please
notify the sender immediately by e-mail if you have received this
e-mail by mistake and delete this e-mail from your system and destroy any copies thereof.

E-mail transmission cannot be guaranteed to be secure or error-free
as information could be intercepted, corrupted, lost, destroyed,
arrive late or incomplete, or contain viruses. The sender therefore
does not accept liability for any errors or omissions in the contents
of this message which arise as a result of e-mail transmission. If
verification is required please request a hard-copy version. This
message is provided for informational purposes and should not be
construed as a solicitation or offer to buy or sell any securities or
related financial instruments.

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