fixes for NZMATH/Sage interoperation

[sagetrac-cwitty]

NZMATH uses a subtype of Python's "long" for its bignum type. This works fine with plain mpmath, but when mpmath runs under Sage it uses Cython code that's incompatible with NZMATH. This patch fixes mpmath-under-sage to fix some incompatibilities with NZMATH. (It also modifies ZZ to allow initialization from a subclass of int/long/float.)

Component: basic arithmetic

Keywords: NZMATH

Author: Carl Witty

Reviewer: Leif Leonhardy

Merged: sage-4.6.alpha2

Issue created by migration from https://trac.sagemath.org/ticket/9915

[sagetrac-cwitty]

Attachment: trac9915_nzmath-mpmath-fixes.patch.gz

[nexttime]

comment:2

Any additional (--[only-]optional[=...]) tests to run with NZMATH installed?

[nexttime]

comment:3

Patch looks reasonable, and doesn't cause additional doctest failures when running ptestlong on (not yet released) Sage 4.6.alpha1 (with NZMATH 1.0.0 installed; Ubuntu 10.04 x86_64).

Positive review so far, still looking for optional NZMATH doctests... ;-)

[nexttime]

Reviewer: Leif Leonhardy

[nexttime]

comment:4

Replying to @nexttime:

... still looking for optional NZMATH doctests... ;-)

Couldn't find any; also, NZMATH doesn't have an spkg-check file.

[nexttime]

comment:5

Is

sage: from nzmath import *

supposed to work? (Gives deprecation warnings and an attribute error.)

But the following works:

sage: import nzmath.rational
sage: r = nzmath.rational.Rational(113r, 355r)
sage: print r
113/355
sage: 

That's of course not much of a test. ;-)

[qed777]

Merged: sage-4.6.alpha2