[Matplotlib-users] TeX + QT4Agg = Broken (Mac OS X)
Hi,
I just ran into the following Bug: When choosing Qt4Agg as my backend in the
matplotlibrc, using TeX will break matplotlib. When choosing backend: MacOSX,
everything works fine. The QT4Agg backend also works fine as long as I'm not
using TeX. Here is a fairly minimal example:
# file: killqtmpl.py #
import pylab as plt
import time
print This works
plt.rcdefaults()
plt.plot([1,2,3])
plt.show()
time.sleep(2)
plt.close()
print This won't work with qt4agg
plt.rc('font', family='sans-serif')
plt.rc('text', usetex=True)
plt.rcParams['text.latex.preamble']=r \usepackage[tx]{sfmath}
\usepackage{helvet}
plt.plot([1,2,3])
plt.show()
time.sleep(2)
plt.close()
print This won't either
plt.rc('font', family='serif')
plt.rcParams['text.latex.preamble']=r\usepackage{mathptmx}
plt.plot([1,2,3])
plt.show()
#
So, when i run the above script using the MacOSX backend, it displays the same
figure (a blue line) three times and outputs:
---
This works
This won't work with qt4agg
This won't either
---
Now when using Qt4Agg, only the first figure will get displayed and the
following error messages appear:
---
In [1]: run killqtmpl.py
This works
This won't work with qt4agg
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (17, 0))
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (15, 0))
---
AttributeErrorTraceback (most recent call last)
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backends/backend_qt4agg.pyc
in paintEvent(self, e)
80
81 if self.replot:
--- 82 FigureCanvasAgg.draw(self)
83 self.replot = False
84
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc
in draw(self)
399
400 self.renderer = self.get_renderer()
-- 401 self.figure.draw(self.renderer)
402
403 def get_renderer(self):
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *args, **kwargs)
53 def draw_wrapper(artist, renderer, *args, **kwargs):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *args, **kwargs)
56 after(artist, renderer)
57
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/figure.pyc
in draw(self, renderer)
882 dsu.sort(key=itemgetter(0))
883 for zorder, func, args in dsu:
-- 884 func(*args)
885
886 renderer.close_group('figure')
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *args, **kwargs)
53 def draw_wrapper(artist, renderer, *args, **kwargs):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *args, **kwargs)
56 after(artist, renderer)
57
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes.pyc
in draw(self, renderer, inframe)
1981
1982 for zorder, a in dsu:
- 1983 a.draw(renderer)
1984
1985 renderer.close_group('axes')
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/artist.pyc
in draw_wrapper(artist, renderer, *args, **kwargs)
53 def draw_wrapper(artist, renderer, *args, **kwargs):
54 before(artist, renderer)
--- 55 draw(artist, renderer, *args, **kwargs)
56 after(artist, renderer)
57
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axis.pyc
in draw(self, renderer, *args, **kwargs)
1035
1036 ticks_to_draw = self._update_ticks(renderer)
- 1037 ticklabelBoxes, ticklabelBoxes2 =
self._get_tick_bboxes(ticks_to_draw, renderer)
1038
1039 for tick in ticks_to_draw:
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axis.pyc
in _get_tick_bboxes(self, ticks, renderer)
986 for tick in ticks:
987 if tick.label1On and tick.label1.get_visible():
-- 988 extent = tick.label1.get_window_extent(renderer)
989 ticklabelBoxes.append(extent)
990 if tick.label2On and tick.label2.get_visible():
Re: [Matplotlib-users] TeX + QT4Agg = Broken (Mac OS X)
Felix Patzelt fe...@neuro.uni-bremen.de writes: I just ran into the following Bug: When choosing Qt4Agg as my backend in the matplotlibrc, using TeX will break matplotlib. Could you run your test script with --verbose-debug, redirect the output to a file and send it to me (off-list; it will be a large file)? -- Jouni K. Seppänen http://www.iki.fi/jks -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] TeX + QT4Agg = Broken (Mac OS X)
Jouni K. Seppänen j...@iki.fi writes: Felix Patzelt fe...@neuro.uni-bremen.de writes: I just ran into the following Bug: When choosing Qt4Agg as my backend in the matplotlibrc, using TeX will break matplotlib. Could you run your test script with --verbose-debug, redirect the output to a file and send it to me (off-list; it will be a large file)? Got it, thanks. This looks really odd: with both MacOSX and QT4Agg backends, kpsewhich finds some TeX-related files, but with QT4Agg some files are not found. It doesn't look like a simple matter of wrong paths or anything like that, because then it would not find any files. We have had multiple problems related to Qt and subprocesses. Some Googling suggests that such problems are quite prevalent and might not be easy to solve. -- Jouni K. Seppänen http://www.iki.fi/jks -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] TeX + QT4Agg = Broken (Mac OS X)
Felix Patzelt fe...@neuro.uni-bremen.de writes:
Matplotlib-Version: 1.1.0
If that's the released version and not something from git, it does not
have one possibly related fix. Could you try cherry-picking commit
09293bf from github, or applying the following patch.
commit 09293bf96f79f305d96ae4070dc89537efb9fb17
Author: Jouni K. Seppänen j...@iki.fi
Date: Tue Dec 27 20:21:34 2011 +0200
Work around subprocess EINTR bug; fixes issue #633
The bug http://bugs.python.org/issue12493 is present in some Python
versions.
The _read_nointr function has been unused since b03a908 (it did
not work on Windows).
diff --git a/CHANGELOG b/CHANGELOG
index 9f5c700..e2a2b9d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+2011-12-27 Work around an EINTR bug in some versions of subprocess. - JKS
+
2011-08-18 Change api of Axes.get_tightbbox and add an optional
keyword parameter *call_axes_locator*. - JJL
diff --git a/lib/matplotlib/dviread.py b/lib/matplotlib/dviread.py
index 85fa70f..8a6dbd2 100644
--- a/lib/matplotlib/dviread.py
+++ b/lib/matplotlib/dviread.py
@@ -835,23 +835,17 @@ def find_tex_file(filename, format=None):
matplotlib.verbose.report('find_tex_file(%s): %s' \
% (filename,cmd), 'debug')
-pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE)
+# stderr is unused, but reading it avoids a subprocess optimization
+# that breaks EINTR handling in some Python versions:
+# http://bugs.python.org/issue12493
+# https://github.com/matplotlib/matplotlib/issues/633
+pipe = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+stderr=subprocess.PIPE)
result = pipe.communicate()[0].rstrip()
matplotlib.verbose.report('find_tex_file result: %s' % result,
'debug')
return result
-def _read_nointr(pipe, bufsize=-1):
-while True:
-try:
-return pipe.read(bufsize)
-except OSError, e:
-if e.errno == errno.EINTR:
-continue
-else:
-raise
-
-
# With multiple text objects per figure (e.g. tick labels) we may end
# up reading the same tfm and vf files many times, so we implement a
# simple cache. TODO: is this worth making persistent?
--
Jouni K. Seppänen
http://www.iki.fi/jks
--
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/___
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