[Numpy-discussion] Numpy on Python3

Charles R Harris charlesr.harris@gmail....
Mon Nov 23 00:33:31 CST 2009


On Sun, Nov 22, 2009 at 10:35 PM, Pauli Virtanen <pav@iki.fi> wrote:

> http://github.com/pv/numpy-work/tree/py3k
>
> $ mkdir -p $PWD/dist/lib/python3.1/site-packages
> $ python3 setup.py install --prefix=$PWD/dist
> $ cd $PWD/dist/lib/python3.1/site-packages && python3
> Python 3.1.1+ (r311:74480, Oct 11 2009, 20:22:16)
> [GCC 4.4.1] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import numpy
> XXX: 3K: numpy.random is disabled for now, uses PyString_*
> XXX: 3K: numpy.ma is disabled for now -- some issues
> >>> numpy.array([1., 2, 3, 4])
> array([ 1.,  2.,  3.,  4.])
> >>> _ + 10
> array([ 11.,  12.,  13.,  14.])
> >>> numpy.ones((4,), dtype=complex)/4
> array([ 0.25+0.j,  0.25+0.j,  0.25+0.j,  0.25+0.j])
> >>> numpy.array([object(), object()])
> array([<object object at 0xb7778810>, <object object at 0xb7778d90>],
> dtype=b'object')
>
>    ***
>
> Things were fairly straightforward this far, just many tiny changes.
> What's left is then sorting out the bigger problems :)
>
> This is still far from being complete:
>
> - Most use of PyString_* needs auditing (note e.g. the b'object' in the
>  dtype print above...).
>
>  I simply added convenience wrappers for PyString -> PyBytes,
>  but this is not the correct choice at all points.
>
> - Also, should dtype='S' be Bytes or Unicode? I chose Bytes for now.
>
>
Yeah, this needs deciding. I think compatibility with old files requires
Bytes, we can't change file formats and keep compatibility.

BTW, I made some changes for py3k that depend on the macro NPY_PY3K being
defined, but didn't actually define it anywhere. It needs to go in one of
the include files.

Chuck
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