On Thursday, May 14, 2020 at 12:14:36 PM UTC+1, Dima Pasechnik wrote:
>
> Hi David,
>
> On Wed, May 13, 2020 at 11:53 PM David Sevilla <> wrote:
>
> > Hi, I have been trying to use SageTeX in a document where I also use the
> fancyhdr package, and I am not able to put Sage computations in the header
> (or the footer). A minimal example follows.
> >
> > \documentclass{article}
> > \usepackage{sagetex}
> > \usepackage{fancyhdr}
> >
> > \begin{document}
> >
> > \begin{sagesilent}
> > n = 1
> > \end{sagesilent}
> >
> > \fancyhead[R]{$\sage{n}$}
> > \title
> > {$\sage{n}$}
> > \maketitle
> > \thispagestyle{fancy}
> >
> > \end{document}
> >
> >
> > After pdflatex, and running sage on the .sagetex.sage file, I get the
> following error:
> >
> > Processing Sage code for test02.tex...
> > Code block (line 7) begin...end
> > Inline formula 0 (line 14)
> > Sage processing complete. Run LaTeX on test02.tex again.
> > Inline formula 1 (line 17)
> >
> > **** Error in Sage code on line 17 of test02.tex! Traceback follows.
> > Traceback (most recent call last):
> > File "test02.sagetex.sage.py", line 24, in <module>
> > _st_.inline(_sage_const_1 , latex(n))
> > File "/usr/lib/python2.7/dist-packages/sagetex.py", line 121, in
> inline
> > '}{{%\n' + s.rstrip() + '}{}{}{}{}}\n')
> > ValueError: I/O operation on closed file
> >
> > **** Running Sage on test02.sage failed! Fix test02.tex and try again.
> > Traceback (most recent call last):
> > File "test02.sagetex.sage.py", line 26, in <module>
> > _st_.goboom(_sage_const_17 )
> > File "/usr/lib/python2.7/dist-packages/sagetex.py", line 264, in
> goboom
> > os.remove(self.filename + '.sagetex.sout.tmp')
> > OSError: [Errno 2] No such file or directory: 'test02.sagetex.sout.tmp'
> >
> > As you can see, "inline formula 0" was generated properly and the
> processing ended there; that line (14) is the \maketitle. On the other
> hand, inline formula 1 was not resolved because the file was already closed
> (note the "Sage processing complete" before); the line 17 where it arose is
> the \end{document}. After the second pdflatex, the Sage result appears
> correctly in the title but "??" appears instead in the header, and I get
> the:
> >
> > LaTeX Warning: Reference `@sageinline1' on page 1 undefined on input
> line 17.
> >
> >
> >
> > Any suggestions on how to combine these two packages is very welcome, or
> at least an explanation of this behaviour (why did Sage think that there
> was nothing else to do after formula 0???). I cannot think of a workaround,
> other than avoiding fancyhdr and searching for smart LaTeX to be able to
> put things into place.
> >
>
> Thanks for the record. A hotfix is to edit
> /usr/lib/python2.7/dist-packages/sagetex.py
> and replace the line 285, which is
>
> self.souttmp.close()
>
> with the following 2 lines:
>
> self.souttmp.flush()
> os.fsync(self.souttmp.fileno())
>
> Then it should work. The problem is that fancyhdr does some kind of
> postprocessing, after sagetex thinks all is done.
> Indeed, with this fix I see running sage with the pdflatex output of
> your file hh.tex
>
> $ sage hh.sagetex.sage
> Processing Sage code for hh.tex...
> Code block (line 7) begin...end
> Inline formula 0 (line 14)
> Sage processing complete. Run LaTeX on hh.tex again.
> Inline formula 1 (line 17)
>
> This should be of course properly fixed - please open an issue on
> https://github.com/sagemath/sagetex
>
I have opened https://github.com/sagemath/sagetex/issues/47
to fix this proprely.
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