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Re: [Matplotlib-users] Crash when trying to show a semilog or log-log plot
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From: Craig F. <cf...@ie...> - 2009-02-23 17:09:33
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Okay, I figured it out. The people who maintain the Gentoo ebuild for matplotlib decided to remove the "unnecessary" copies of fonts, pycxx and pyparser that are bundled with matplotlib. The latest version of the ebuild contains code that explicitly removes the bundled fonts, pyparser and pycxx modules. I would never have thought to look there if you hadn't pointed this out. I posted a bug on Gentoo (260025) requesting that they use the bundled pyparsing module, and check with the matplotlib developers about the other "redundant" packages before deleting them. Thanks for your help. Craig ----- Original Message ---- From: Michael Droettboom <md...@st...> To: Craig Finch <cf...@ie...> Cc: mat...@li... Sent: Monday, February 23, 2009 9:49:06 AM Subject: Re: [Matplotlib-users] Crash when trying to show a semilog or log-log plot Strange. I am unable to reproduce this with 0.98.2 (0.98.3 or 0.98.5)... It's happening inside of the math expression renderer, which is used to draw the exponents that happen with semilog and log-log axes. It doesn't, however, appear to be font-related, which is a frequent installation/system problem. What is strange about this traceback is that it is using the system-wide installed version of pyparsing.py, and not the one that comes with matplotlib. matplotlib is very sensitive to small version changes in pyparsing, so we distribute our own copy and try to use it. If you temporarily move /usr/lib/python2.4/site-packages/pyparsing.py to another location, does that solve the problem? If so, I will look into how we're importing pyparsing.py to ensure we always use the local copy. Mike Craig Finch wrote: > I am using matplotlib-0.98.5.2 and getting a strange crash when trying to show() a window with semilog or log-log axes. Here is a simple script that will cause the crash: > > import pylab > from numpy import * > x = arange(1., 10., 0.1) > y = x**2 > pylab.semilogx(x,y) > pylab.show() > > At the end of this message is a sample of the output. I had to cut it down because it's apparently stuck in a loop in pyparsing.py and keeps outputting the same repetitive message. Did I find a bug here? Any suggestions would be appreciated. > > Craig > > Sample output: > ------------------------------------------------------ > File "//usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py", line 352, in expose_event > self._render_figure(self._pixmap, w, h) > File "//usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtkagg.py", line 75, in _render_figure > FigureCanvasAgg.draw(self) > File "//usr/lib/python2.4/site-packages/matplotlib/backends/backend_agg.py", line 279, in draw > self.figure.draw(self.renderer) > File "//usr/lib/python2.4/site-packages/matplotlib/figure.py", line 772, in draw > for a in self.axes: a.draw(renderer) > File "//usr/lib/python2.4/site-packages/matplotlib/axes.py", line 1601, in draw > a.draw(renderer) > File "//usr/lib/python2.4/site-packages/matplotlib/axis.py", line 710, in draw > tick.draw(renderer) > File "//usr/lib/python2.4/site-packages/matplotlib/axis.py", line 193, in draw > self.label1.draw(renderer) > File "//usr/lib/python2.4/site-packages/matplotlib/text.py", line 452, in draw > bbox, info = self._get_layout(renderer) > File "//usr/lib/python2.4/site-packages/matplotlib/text.py", line 252, in _get_layout > w, h, d = renderer.get_text_width_height_descent( > File "//usr/lib/python2.4/site-packages/matplotlib/backends/backend_agg.py", line 152, in get_text_width_height_descent > ox, oy, width, height, descent, fonts, used_characters = \ > File "//usr/lib/python2.4/site-packages/matplotlib/mathtext.py", line 2808, in parse > box = self._parser.parse(s, font_output, fontsize, dpi) > File "//usr/lib/python2.4/site-packages/matplotlib/mathtext.py", line 2259, in parse > self._expression.parseString(s) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 1065, in parseString > loc, tokens = self._parse( instring, 0 ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 998, in _parseCache > value = self._parseNoCache( instring, loc, doActions, callPreParse ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 941, in _parseNoCache > loc,tokens = self.parseImpl( instring, preloc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 2577, in parseImpl > return self.expr._parse( instring, loc, doActions, callPreParse=False ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 998, in _parseCache > value = self._parseNoCache( instring, loc, doActions, callPreParse ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 941, in _parseNoCache > loc,tokens = self.parseImpl( instring, preloc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 2325, in parseImpl > loc, exprtokens = e._parse( instring, loc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 998, in _parseCache > value = self._parseNoCache( instring, loc, doActions, callPreParse ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 941, in _parseNoCache > loc,tokens = self.parseImpl( instring, preloc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 2690, in parseImpl > loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 998, in _parseCache > value = self._parseNoCache( instring, loc, doActions, callPreParse ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 941, in _parseNoCache > loc,tokens = self.parseImpl( instring, preloc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 2325, in parseImpl > loc, exprtokens = e._parse( instring, loc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 998, in _parseCache > value = self._parseNoCache( instring, loc, doActions, callPreParse ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 941, in _parseNoCache > > ------------- snip ------------- > > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 2309, in parseImpl > loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 998, in _parseCache > value = self._parseNoCache( instring, loc, doActions, callPreParse ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 941, in _parseNoCache > loc,tokens = self.parseImpl( instring, preloc, doActions ) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 2321, in parseImpl > raise ParseSyntaxException(pe) > File "/usr/lib/python2.4/site-packages/pyparsing.py", line 230, in __init__ > super(ParseSyntaxException, self).__init__( > TypeError: super() argument 1 must be type, not classobj > > > > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA > -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise > -Strategies to boost innovation and cut costs with open source participation > -Receive a $600 discount off the registration fee with the source code: SFAD > http://p.sf.net/sfu/XcvMzF8H > _______________________________________________ > Matplotlib-users mailing list > Mat...@li... > 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 |
