Fidel wrote:
> Hello,
>
> I'm running Sage Version 3.4.1 on ubuntu 8.04.
>
> I'm trying to implement latex(G) for a graph G. After creating my own
> branch to work in I executed the command
>
> sage -b
>
> to build the library and got no errors.
>
> Within the latex(G) procedure I have this fragment of code
>
> for u in self:
> # then specify the color of the label
> s = s + '\color{' + color_names[ color_names[ u ] ] +
> '}{'
> if vertex_math:
> s = s+'$'
> s = s+str(latex(u))
> if vertex_math:
> s = s+'$'
> s = s+'},\n'
>
> As you can observe, the function latex(u) is used, where u is a
> vertex, and this is what I get in sage
>
> sage: G=graphs.PetersenGraph()
> sage: latex(G)
> ---------------------------------------------------------------------------
> NameError Traceback (most recent call
> last)
>
> /home/fidel/<ipython console> in <module>()
>
> /opt/sage-3.4.1/local/lib/python2.5/site-packages/sage/misc/latex.pyc
> in latex(x)
> 138 def latex(x):
> 139 if hasattr(x, '_latex_'):
> --> 140 return LatexExpr(x._latex_())
> 141
> 142 for k, f in latex_table.iteritems():
>
> /opt/sage-3.4.1/local/lib/python2.5/site-packages/sage/graphs/
> graph.pyc in _latex_(self, layout, bb, units, prefix, vertex_math,
> style, vertex_color, edge_color, label_color, labels)
> 778 if vertex_math:
> 779 s = s+'$'
> --> 780 s = s+str(latex(u))
> 781 if vertex_math:
> 782 s = s+'$'
>
> NameError: global name 'latex' is not defined
>
> Is there a package I should import to avoid getting this message?
>
Yes:
sage: search_src('import', 'latex')
categories/category.py:from sage.misc.latex import latex
combinat/output.py:from sage.misc.latex import latex
[snip]
So apparently it's:
from sage.misc.latex import latex
Jason
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