#9636: Catch output from PARI in Sage
------------------------------+---------------------------------------------
Reporter: jdemeyer | Owner: was
Type: defect | Status: positive_review
Priority: major | Milestone: sage-4.6
Component: interfaces | Keywords:
Author: Jeroen Demeyer | Upstream: N/A
Reviewer: Leif Leonhardy | Merged:
Work_issues: |
------------------------------+---------------------------------------------
Changes (by leif):
* cc: robertwb (added)
* reviewer: => Leif Leonhardy
* status: needs_review => positive_review
Old description:
> The output from print() functions in libpari is directly written to
> stdout and is not caught by Sage. For example, the following doctest
> fails:
> {{{
> def printhello():
> """
> sage: printhello()
> hello
> """
> pari('print("hello")')
> }}}
> It gives
> {{{
> File "/home/jdemeyer/paritest.sage", line 3:
> sage: printhello()
> Expected:
> hello
> Got nothing
> }}}
>
> Luckily, libpari provides ways to redirect the output. There should a
> small Cython wrapper to direct the PARI output to sys.stdout.write().
>
> Dependencies: #9661, #9343
New description:
The output from {{{print()}}} functions in {{{libpari}}} is directly
written to {{{stdout}}} and is not caught by Sage. For example, the
following doctest fails:
{{{
def printhello():
"""
sage: printhello()
hello
"""
pari('print("hello")')
}}}
It gives
{{{
File "/home/jdemeyer/paritest.sage", line 3:
sage: printhello()
Expected:
hello
Got nothing
}}}
Luckily, {{{libpari}}} provides ways to redirect the output. There should
be a small Cython wrapper to direct the PARI output to Python's
{{{sys.stdout.write()}}}.
Dependencies: #9661, #9343
--
Comment:
{{{
cdef extern:
PariOUT defaultOut
PariOUT defaultErr
}}}
should perhaps migrate to {{{sage/libs/pari/decl.pxi}}}, too.
'''Positive review''' from me though. Robert, anything to complain about?
----
I wonder when Cython will support {{{const}}}...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9636#comment:6>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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