On 7 Apr 2005 11:04:30 -0700, "Greg" <[EMAIL PROTECTED]> wrote:
>That worked, thanks a lot.
That's great, and given your Matlab background, you'll no doubt find
lots of other uses for numeric / numarray.
I'd just like to make a few other points:
(1) struct.unpack shouldn't be that slow, provided you do it in one
hit -- see example below. Looping, unpacking one or two items at a
time, could be a dog.
(2) If you are concerned about the efficiency of any particular
feature, time it. Any surprises are usually pleasant.
(3) There is an intermediate alternative -- the built-in array module.
See example below.
(4) Be careful of endian considerations if you are getting data from
"outside".
Example:
>>> import struct
>>> s = struct.pack("hhhh", 1, 2, -3, 4)
>>> ha = array.array('h', s)
>>> ha
array('h', [1, 2, -3, 4])
>>> fmt = '%dh' % (len(s) // 2)
>>> fmt
'4h'
>>> ha2 = struct.unpack(fmt, s)
>>> ha2
(1, 2, -3, 4)
>>>
Cheers,
John
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