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
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: http://www.sagemath.org
