[Python-Dev] (some) C99 added to PEP 7 (original) (raw)

Chris Barker chris.barker at noaa.gov
Thu Sep 8 16:01:08 EDT 2016

On Thu, Sep 8, 2016 at 9:39 AM, Random832 <random832 at fastmail.com> wrote:

You're talking about changing Pyssizet, right?

wouldn't that be the pointer size?

Is there a "long" in there anywhere in the integer implementation?

My example is this:

on OS-X, py3.5:

import numpy as np

In [9]: arr = np.array([1,2,3])

Out[10]: array([1, 2, 3])

In [11]: arr.dtype

Out[11]: dtype('int64')

I don't have py3 running on win64 anywhere right now, but in win64 py2, that would give you:

dtype('int32')

as it's a "long" under the hood

(and I'm pretty sure that is not because of numpy code itself, but rather how Cpython is written/compiled)

Does py3 already use int64?

-CHB

--

Christopher Barker, Ph.D. Oceanographer

Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception

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