Multiprecision arithmetic library question.

[Michael Press]

I already compiled and installed the GNU multiprecision library
on Mac OS X, and link to it in C programs.
How do I link to the library from Python?
I do not want to download and install redundant material.
(I am new to Python)

--
Michael Press

[casevh]

On Jun 17, 5:13*pm, Michael Press <[e-mail]:

I already compiled and installed the GNU multiprecision library
on Mac OS X, and link to it in C programs.
How do I link to the library from Python?
I do not want to download and install redundant material.
(I am new to Python)

--
Michael Press

GMPY provides the interface between Python and GMP. It is available at

http://code.google.com/p/gmpy/downloads/list

casevh

[Mark Wooding]

Michael Press <ru****@pacbell.netwrote:

I already compiled and installed the GNU multiprecision library
on Mac OS X, and link to it in C programs.
How do I link to the library from Python?

You know that Python already supports multiprecision integer arithmetic,
right? If you desperately want GMP, though, there's the gmpy module
(q.g.).

-- [mdw]

[Michael Press]

In article <sl****************@metalzone.distorted.org.uk>,
Mark Wooding <md*@distorted.org.ukwrote:

Michael Press <ru****@pacbell.netwrote:

I already compiled and installed the GNU multiprecision library
on Mac OS X, and link to it in C programs.
How do I link to the library from Python?

You know that Python already supports multiprecision integer arithmetic,
right? If you desperately want GMP, though, there's the gmpy module
(q.g.).

No, I do not know that. Define desperate.
Does Python support the extended Euclidean algorithm
and other number theory functions?
How fast does Python multiply?
Not that the latter is particularly important,
as C is built for speed.

I've been fooling around. Ran dir(gmpy), and
it does not show the full complement of GMP
library functions, such as the various division
functions. e.g. mpz_tdiv_qr.

--
Michael Press

[duncan smith]

Michael Press wrote:

In article <sl****************@metalzone.distorted.org.uk>,
Mark Wooding <md*@distorted.org.ukwrote:

>Michael Press <ru****@pacbell.netwrote:

>>I already compiled and installed the GNU multiprecision library
on Mac OS X, and link to it in C programs.
How do I link to the library from Python?

You know that Python already supports multiprecision integer arithmetic,
right? If you desperately want GMP, though, there's the gmpy module
(q.g.).

No, I do not know that. Define desperate.
Does Python support the extended Euclidean algorithm
and other number theory functions?
How fast does Python multiply?
Not that the latter is particularly important,
as C is built for speed.

I've been fooling around. Ran dir(gmpy), and
it does not show the full complement of GMP
library functions, such as the various division
functions. e.g. mpz_tdiv_qr.

There's also
http://www.egenix.com/products/pytho...ntal/mxNumber/. I'm not
sure how the functionality compares to GMPY.

Duncan

[casevh]

No, I do not know that. Define desperate.

Does Python support the extended Euclidean algorithm
and other number theory functions?

No.

How fast does Python multiply?

Python uses the Karatsuba algorithm which O(n^1.585). Division is
still O(n^2).

Not that the latter is particularly important,
as C is built for speed.

I've been fooling around. Ran dir(gmpy), and
it does not show the full complement of GMP
library functions, such as the various division
functions. e.g. mpz_tdiv_qr.

gmpy implements the Python numeric model using GMP and exposes some of
the high-level functions. Are you looking for low-level wrapper that
exposes all the GMP library functions?

--
Michael Press