Karim Belabas on Tue, 30 Jul 2019 00:36:56 +0200 |
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Re: real/imag for t_QUAD |
* Karim Belabas [2019-07-30 00:35]: > * Vincent Delecroix [2019-07-30 00:28]: > > Le 30/07/2019 à 00:25, Bill Allombert a écrit : > > > But the real question is why do you want to use t_QUAD ? > > > > I don't want to use it. I am working on cypari2. I want to fix the > > conversion of GEN to Python complex number (double floating point > > precision). This used to rely on real_i/imag_i and the question is > > how should I deal with t_QUAD properly? > > x = quadtofp(x, DEFAULTPREC); > > and then you have an ordinary complex number (possibly real or even rational) > to worry about. More generally, gtofp() is the standard libpari idiom to replace GP's x * 1. Cheers, K.B. -- Karim Belabas, IMB (UMR 5251) Tel: (+33) (0)5 40 00 26 17 Universite de Bordeaux Fax: (+33) (0)5 40 00 21 23 351, cours de la Liberation http://www.math.u-bordeaux.fr/~kbelabas/ F-33405 Talence (France) http://pari.math.u-bordeaux.fr/ [PARI/GP] `