array of 64-bit ints?

[Nick Craig-Wood]

Martin v. L?wis <martin at v.loewis.de> wrote:
> > Is it possible to have an array of 64-bit-ints using the standard Python 
> > array module?  On my 64-bit architecture (AMD64, MSVC), both "int" and 
> > "long int" are 32 bit integers.  To declare 64-bit ints, one needs either 
> > "long long int" or "size_t".  However, according to the Python array 
> > documentation, arrays of "size_t" or "long long int" are not available.
> 
>  No, it's not possible.

You could do it with ctypes like this...

from ctypes import *

Array = c_int64 * 100

a = Array()
for i in range(100):
    a[i] = 2**63 - i
    
for i in range(100):
    print a[i]

prints

-9223372036854775808
9223372036854775807
9223372036854775806
[snip]
9223372036854775710
9223372036854775709

ctypes arrays are fixed length once created though.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick