On Apr 11, 5:57 pm, Rob Beezer <goo...@beezer.cotse.net> wrote:
> I've been adding documentation to sage/misc/latex.py and discovered
> that if I add a trivial docstring (empty, one-line, other variants of
> trivial) to the first function in the file (which is "have_dvipng")
> then a test run on that file really goes haywire. Take out the
> trivial docstring and all tests pass.
>
> It would appear that the value of the boolean constant EMBEDDED_MODE
> might be affected, as much of the erroneous doctest output gets
> wrapped in HTML tags, when the expected output is not in this format.
> I haven't put much work into trying to isolate the problem (other than
> removing/adding the additional docstring repeatedly - that sound you
> hear is me banging my head on the wall). I'm wondering if this sounds
> familiar to anybody, or if there is output I could post that would be
> helpful in diagnosing the problem.
>
> Thanks,
> Rob
Hi Rob,
I figured out how to fix the problem, although I still don't know why
adding a docstring should cause it.
To fix it: the docstring for "print_or_typeset" contains the lines
sage: sys.displayhook = sage.misc.latex.pretty_print
sage: sage.misc.latex.print_or_typeset(3)
<html><span class="math">3</span></html>
sage: sage.misc.latex.EMBEDDED_MODE=False
You need to add a line to the beginning and a line to the end, making
it:
sage: TEMP = sys.displayhook
sage: sys.displayhook = sage.misc.latex.pretty_print
sage: sage.misc.latex.print_or_typeset(3)
<html><span class="math">\newcommand{\Bold}[1]{\mathbf{#1}}3</
span></html>
sage: sage.misc.latex.EMBEDDED_MODE=False
sage: sys.displayhook = TEMP
This is included in the patch for <http://trac.sagemath.org/sage_trac/
ticket/5610>, although that patch includes lots of other things, too.
As part of that patch, I added a few doctests to latex.py, but I don't
have time to get anywhere close to 100%.
John
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