I think I already understood this distinction between type and parent. What
was not clear (and still is not, but I have homework to do about this
before making new noise on the list...) is how this translates in terms of
(Python) programming.
Provisorily, I conclude :
- type : look for
On 2016-10-17 15:10, Emmanuel Charpentier wrote:
Thank you Vincent. this is much clearer.
It seems that I have some things left to understand about the Sage class
and types hierarchies.
There is a difference between a type and a parent.
A parent is a mathematical object. It is the
Thank you Vincent. this is much clearer.
It seems that I have some things left to understand about the Sage class
and types hierarchies. Sorry for the noise...
--
Emmanuel Charpentier
Le lundi 17 octobre 2016 13:55:14 UTC+2, vdelecroix a écrit :
>
> CDF is the name of a Python variable not a
CDF is the name of a Python variable not a type.
sage: a = CDF.an_element()
sage: type(a)
You need to use this ComplexDoubleElement to type your function.
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Dear Jeroen,
Le lundi 17 octobre 2016 09:58:38 UTC+2, Jeroen Demeyer a écrit :
>
> On 2016-10-17 09:53, Emmanuel Charpentier wrote:
> > I need to use a fast random (complex) number generatot.
> >
> > The following :
> >
> > sage: %%cython
> > : from sage.misc.prandom import random
> >
I need to use a fast random (complex) number generatot.
The following :
sage: %%cython
: from sage.misc.prandom import random
: cpdef complex crand(double x):
: return x*random()+x*1j*random()
is about 77 times faster than its Python equivalent :
sage: def prand(x):
:
