[Python-Dev] ANN: Pyrex - a language for writing Python extension modules (original) (raw)

Greg Ewing greg@cosc.canterbury.ac.nz
Thu, 04 Apr 2002 18:52:10 +1200 (NZST)

Folks here may be interested in my latest project: A new language specially designed for writing Python extension modules.

Pyrex is more or less Python with C data types added. You can write functions which freely intermix operations on Python and C data, with all Python reference counting and error checking completely automated.

An example Pyrex module is shown below. For more information, see:

http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/

where you can also download version 0.1 and try it out. I'm very keen to get feedback on this, both to find out whether people think it's useful, and to help me debug it!

Oh, yeah, here's the example. It finds prime numbers at C speed.

def primes(int kmax): cdef int n, k, i cdef int p[1000] result = [] if kmax > 1000: kmax = 1000 k = 0 n = 2 while k < kmax: i = 0 while i < k and n % p[i] <> 0: i = i + 1 if i == k: p[k] = n k = k + 1 result.append(n) n = n + 1 return result

Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg@cosc.canterbury.ac.nz +--------------------------------------+