#9640: Change PARI error catching mechanism
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Reporter: jdemeyer | Owner: was
Type: enhancement | Status:
Priority: major | needs_review
Component: interfaces | Milestone: sage-5.13
Keywords: pari error interrupt | Resolution:
Authors: Peter Bruin, Jeroen Demeyer | Merged in:
Report Upstream: N/A | Reviewers:
Branch: | Work issues:
Dependencies: #14029, #13311 | Commit:
| Stopgaps:
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Comment (by jdemeyer):
Replying to [comment:28 pbruin]:
> What is the use of `PariError.parimessage()`? It doesn't seem to be
used, and appears to normally be a substring of `PariError.__str__()`. Do
you have any application for it in mind, or can it be removed?
For me, it can be removed. But it existed before (as a function
`__errmessage()`) and one possible use would be to check that an error is
of a given type without relying on the PARI error codes (for example, in
pure Python code). Something like:
{{{
#!python
try:
pari.....
except PariError as E:
if E.parimessage() == "division by zero":
raise ZeroDivisionError
else:
raise
}}}
Perhaps this is never going to happen, but at least the method
`parimessage()` doesn't hurt either.
--
Ticket URL: <http://trac.sagemath.org/ticket/9640#comment:29>
Sage <http://www.sagemath.org>
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