#13624: KeyError raised by GraphLatex.dot2tex_picture when edge_labels=True
---------------------------------+------------------------------------------
   Reporter:  slabbe             |             Owner:  tbd     
       Type:  defect             |            Status:  new     
   Priority:  major              |         Milestone:  sage-5.5
  Component:  optional packages  |          Keywords:  dot2tex 
Work issues:                     |   Report Upstream:  N/A     
  Reviewers:                     |           Authors:          
  Merged in:                     |      Dependencies:          
   Stopgaps:                     |  
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 The following is ok :

 {{{
 sage: G = DiGraph()
 sage: G.add_edge(3333, 88, 'my_label')
 sage: opts = G.latex_options()
 sage: opts.set_options(format='dot2tex')
 sage: view(G)
 }}}

 but with `edges_labels=True` a !KeyError is raised :

 {{{
 sage: opts.set_options(edge_labels=True)
 sage: view(G)
 ERROR    Failed to process input
 Traceback (most recent call last):
   File "/Users/slabbe/Applications/sage-5.2/local/lib/python2.7/site-
 packages/dot2tex/dot2tex.py", line 2939, in main
     s =  conv.convert(dotdata)
   File "/Users/slabbe/Applications/sage-5.2/local/lib/python2.7/site-
 packages/dot2tex/dot2tex.py", line 794, in convert
     return self.do_preview_preproc()
   File "/Users/slabbe/Applications/sage-5.2/local/lib/python2.7/site-
 packages/dot2tex/dot2tex.py", line 1167, in do_preview_preproc
     hp,dp,wt = pp.texdims[name]
 KeyError: '3333880'
 }}}

 The error is also raised by `dot2tex_picture` method:

 {{{
 sage: G = DiGraph()
 sage: G.add_edge(0, 1, 'p0')
 sage: opts = G.latex_options()
 sage: opts.dot2tex_picture()
 '\n\\begin{tikzpicture}[>=latex,line join=bevel,]\n%%\n\\node (1) at
 (6bp,7bp) [draw,draw=none] {$1$};\n  \\node (0) at (6bp,57bp)
 [draw,draw=none] {$0$};\n  \\draw [black,->] (0) ..controls (6bp,44.053bp)
 and (6bp,33.103bp)  .. (1);\n%\n\\end{tikzpicture}\n'
 sage: opts.set_options(edge_labels=True)
 sage: opts.dot2tex_picture()
 ERROR    Failed to process input
 Traceback (most recent call last):
   File "/Users/slabbe/Applications/sage-5.2/local/lib/python2.7/site-
 packages/dot2tex/dot2tex.py", line 2939, in main
     s =  conv.convert(dotdata)
   File "/Users/slabbe/Applications/sage-5.2/local/lib/python2.7/site-
 packages/dot2tex/dot2tex.py", line 794, in convert
     return self.do_preview_preproc()
   File "/Users/slabbe/Applications/sage-5.2/local/lib/python2.7/site-
 packages/dot2tex/dot2tex.py", line 1167, in do_preview_preproc
     hp,dp,wt = pp.texdims[name]
 KeyError: '010'
 ''
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13624>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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