I think you should put "sage:" in front of all complete commands and
"..." in front of continuation lines. I was making multi-line cycles
this way. Triple quotes may conflict with the way how SageTeX produces
its files. Did you try triple single quotes? ( ' + ' + ' instead of "
+ " + ")
Andrey
On Oct 25, 9:10 am, javier <vengor...@gmail.com> wrote:
> Hi all,
>
> I am trying to add some Sage examples to my lecture notes for a course
> in Commutative Algebra. In particular want to include an example on
> how to define the power set ring in sage. I would like to list some
> big chunks of sage code with nice colorization and all, so I was
> trying to use the `sagecommandline` environment. While this works for
> simple one-liners, I get some problems using it for classes. Here is
> some minimal example that goes wrong:
>
> \begin{sagecommandline}
> class PowerSetRingElement(RingElement):
> """
> Class for defining elements of a power set ring
> """
> def __init__(self, Y, parent=None):
> try:
> YY = Set(Y)
> if YY.issubset(parent._set):
> self._subset = YY
> self._parent = parent
> RingElement.__init__(self, parent)
> else:
> raise TypeError, "\percent{}s must be a subset of
> \percent{}s"(Y, parent._set)
> except:
> raise NotImplementedError
>
> def _repr_(self):
> return "\percent{}s"\percent{}self._subset
>
> def _add_(self, other):
> return
> self._parent(self._subset.symmetric_difference(other._subset))
>
> def _mul_(self, other):
> return self._parent(self._subset.intersection(other._subset))
> \end{sagecommandline}
>
> Now here I face several problems. First of all, sagetex seems to raise
> syntax errors whenever the code inside a sagecommandline environment
> contains strings with triple quotes """
>
> Now, if I remove the docstring, then sage runs just fine on the
> sagetex file, but (after re-running latex) nothing shows up on the
> final pdf.
>
> If I try to include the "sage" words at the beginning, as if I typed
> it in the command line
>
> \begin{sagecommandline}
> sage: class PowerSetRingElement(RingElement):
> def __init__(self, Y, parent=None):
> try:
> YY = Set(Y)
> if YY.issubset(parent._set):
> self._subset = YY
> self._parent = parent
> RingElement.__init__(self, parent)
> else:
> raise TypeError, "%s must be a subset of %s"(Y,
> parent._set)
> except:
> raise NotImplementedError
> \end{sagecommandline}
>
> then I get
>
> **** Error in Sage code on line 312 of 3201-sage.tex! Traceback
> follows.
> Traceback (most recent call last):
> File "3201-sage.sagetex.py", line 104, in <module>
> """, globals(), locals(), True)
> File "/Applications/sage/local/lib/python2.6/site-packages/
> sagetex.py", line 203, in commandline
> exec current_statement in globals, locals
> File "<string>", line 1
> class PowerSetRingElement(RingElement):
> ^
> SyntaxError: unexpected EOF while parsing
>
> Any ideas?
>
> Cheers,
> Javier
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