2010/12/13 Steve Nicholes <emailaddress_...@yahoo.com>:
> Hello,
>
> I recently upgraded matplotlib v0.98.5 to 1.0. Now when I try to plot data
> using latex for the figure labels my scripts fail. I have not changed my
> code so I'm not sure where the error is coming from. I have tried
> reinstalling and updating MikTex and Ghostscript but that has not helped (I'm
> running Windows 7 and Python 2.6). The actual error I get is below. Any
> thoughts?
It tries to find some .tfm font file from LaTeX via ``kpsewhich
<filename>``. The result of this might be '' (the empty string),
indicating that there was no output on stdout, meaning it couldn't run
``kpsewhich <filename>``. ``kpsewhich`` is used to find files on most
TeX distributions, but:
dviread.py:812:
I hear MikTeX (a popular distribution on Windows)
doesn't use kpathsea, so what do we do? (TODO)
Can you please try to find an executable ``kpsewhich`` or look for
some "kpathsea" keyword in the MikTeX docs, to find out if MikTeX uses
the kpathsea library to find files.
You said, it worked before, so maybe you have some PATH problem? Did
you change anything else besides the mpl version?
Friedrich
> Traceback (most recent call last):
> File "C:\Python26\lib\site-packages\matplotlib\backends\backend_qt4.py",
> line 215, in resizeEvent
> self.draw()
> File "C:\Python26\lib\site-packages\matplotlib\backends\backend_qt4agg.py",
> line 130, in draw
> FigureCanvasAgg.draw(self)
> File "C:\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
> line 394, in draw
> self.figure.draw(self.renderer)
> File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python26\lib\site-packages\matplotlib\figure.py", line 798, in draw
> func(*args)
> File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python26\lib\site-packages\matplotlib\axes.py", line 1934, in draw
> a.draw(renderer)
> File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python26\lib\site-packages\matplotlib\axis.py", line 1017, in draw
> tick.draw(renderer)
> File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python26\lib\site-packages\matplotlib\axis.py", line 236, in draw
> self.label2.draw(renderer)
> File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
> File "C:\Python26\lib\site-packages\matplotlib\text.py", line 524, in draw
> bbox, info = self._get_layout(renderer)
> File "C:\Python26\lib\site-packages\matplotlib\text.py", line 307, in
> _get_layout
> ismath=ismath)
> File "C:\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
> line 171, in get_text_width_height_descent
> renderer=self)
> File "C:\Python26\lib\site-packages\matplotlib\texmanager.py", line 608, in
> get_text_width_height_descent
> page = iter(dvi).next()
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 65, in
> __iter__
> have_page = self._read()
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 121, in
> _read
> self._dispatch(byte)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 209, in
> _dispatch
> self._fnt_def(k, c, s, d, a, l, n)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 370, in
> _fnt_def
> vf = _vffile(n[-l:])
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 871, in
> _vffile
> return _fontfile(texname, Vf, '.vf', _vfcache)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 860, in
> _fontfile
> result = class_(filename)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 479, in
> __init__
> self._read()
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 121, in
> _read
> self._dispatch(byte)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 508, in
> _dispatch
> Dvi._dispatch(self, byte)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 209, in
> _dispatch
> self._fnt_def(k, c, s, d, a, l, n)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 546, in
> _fnt_def
> Dvi._fnt_def(self, k, *args)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 372, in
> _fnt_def
> self.fonts[k] = DviFont(scale=s, tfm=tfm, texname=n, vf=vf)
> File "C:\Python26\lib\site-packages\matplotlib\dviread.py", line 418, in
> __init__
> nchars = max(tfm.width.iterkeys()) + 1
> AttributeError: 'NoneType' object has no attribute 'width'
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