On Jan 14, 2008 10:33 PM, Dan Drake <[EMAIL PROTECTED]> wrote:
> On Mon, 14 Jan 2008 at 05:05PM -0800, William Stein wrote:
> > On Jan 14, 2008 5:00 PM, Dan Drake <[EMAIL PROTECTED]> wrote:
> > > In a .sage script file, I have:
> > >
> > > maple.eval('plotsetup(ps, plotoutput=`logplot.eps`, \
> > > plotoptions=`portrait,noborder,color`)')
> > > maple.eval('plot(log(2*x), x=1..2,filled=true,color=yellow, \
> > > view=[.75..2.25,0..1.5])')
> > >
> > > but the corresponding .py file has, for the second command,
> > >
> > > maple.eval('plot(log(2*x), x=1..2,filled=true,color=yellow, \
> > > view=(ellipsis_range(.75,Ellipsis,2.25,0,Ellipsis,1.5)))')
> > >
> > > Maple obviously doesn't understand this. It seems the preparser is a
> > > bit too eager; it needs to ignore stuff that will get passed to
> > > Maple or whatever. Can this be fixed?
> >
> > The problem is the multiple lines. Try the same thing but without the
> > \ at the end of the line and see what happens.
>
> It works fine in that case...which I discovered (naturally) a minute or
> two after sending the message.
>
> Looks like the preparser is not aware of the
> backslash-continues-the-line convention.
The parts of the preparser I wrote are:
sage: v = '1 + \
....: 3'
sage: v
'1 + 3'
But Robert B. wrote the really cool [n..m] parser code,
and unfortunately he appears to have written it in a way that
does not work correctly with \'s. He'll undoubtedly see
this and fix it.
I've made this trac #1781:
http://trac.sagemath.org/sage_trac/ticket/1781
William
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