Re: [Pytables-users] Use of recarrays as representation for Tables in memory

[Francesc A. <fa...@py...>]

Yes, I think it would make more sense to return a recarray too.  
However, I remember many time ago (3, 4 years?) that NumPy developers 
were recommending using structured arrays instead of recarrays.  I don't 
remember exactly the arguments, but I think that was the reason why the 
structured arrays were declared the default for reading tables.  But 
this could be changed, of course...

Francesc

On 6/28/12 8:25 PM, Anthony Scopatz wrote:
> Hmmm Ok.  Maybe there needs to be a recarray flavor.
>
> I kind of like just returning a normal ndarray, though I see your 
> argument for returning a recarray.  Maybe some of the other devs can 
> jump in here with an opinion.
>
> Be Well
> Anthony
>
> On Thu, Jun 28, 2012 at 12:37 PM, Alvaro Tejero Cantero 
> <al...@mi... <mailto:al...@mi...>> wrote:
>
>     I just tested: passing an object of type numpy.core.records.recarray
>     to the constructor of createTable and then reading back it into memory
>     via slicing (h5f.root.myobj[:] ) returns to me a numpy.ndarray.
>
>     Best,
>
>     -á.
>
>
>     On Thu, Jun 28, 2012 at 5:30 PM, Anthony Scopatz
>     <sc...@gm... <mailto:sc...@gm...>> wrote:
>     > Hi Alvaro,
>     >
>     > I think if you save the table as a record array, it should
>     return you a
>     > record array.  Or does it return a structured array?  Have you
>     tried this?
>     >
>     > Be Well
>     > Anthony
>     >
>     > On Thu, Jun 28, 2012 at 11:22 AM, Alvaro Tejero Cantero
>     <al...@mi... <mailto:al...@mi...>>
>     > wrote:
>     >>
>     >> Hi,
>     >>
>     >> I've noticed that tables are loaded in memory as structured arrays.
>     >>
>     >> It seems that returning recarrays by default would be much in the
>     >> spirit of the natural naming preferences of PyTables.
>     >>
>     >> Is there a reason not to do so?
>     >>
>     >> Cheers,
>     >>
>     >> Álvaro.
>     >>
>     >>
>     >>
>     ------------------------------------------------------------------------------
>     >> Live Security Virtual Conference
>     >> Exclusive live event will cover all the ways today's security and
>     >> threat landscape has changed and how IT managers can respond.
>     Discussions
>     >> will include endpoint security, mobile security and the latest
>     in malware
>     >> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>     >> _______________________________________________
>     >> Pytables-users mailing list
>     >> Pyt...@li...
>     <mailto:Pyt...@li...>
>     >> https://lists.sourceforge.net/lists/listinfo/pytables-users
>     >
>     >
>     >
>     >
>     ------------------------------------------------------------------------------
>     > Live Security Virtual Conference
>     > Exclusive live event will cover all the ways today's security and
>     > threat landscape has changed and how IT managers can respond.
>     Discussions
>     > will include endpoint security, mobile security and the latest
>     in malware
>     > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>     > _______________________________________________
>     > Pytables-users mailing list
>     > Pyt...@li...
>     <mailto:Pyt...@li...>
>     > https://lists.sourceforge.net/lists/listinfo/pytables-users
>     >
>
>     ------------------------------------------------------------------------------
>     Live Security Virtual Conference
>     Exclusive live event will cover all the ways today's security and
>     threat landscape has changed and how IT managers can respond.
>     Discussions
>     will include endpoint security, mobile security and the latest in
>     malware
>     threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>     _______________________________________________
>     Pytables-users mailing list
>     Pyt...@li...
>     <mailto:Pyt...@li...>
>     https://lists.sourceforge.net/lists/listinfo/pytables-users
>
>
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>
>
> _______________________________________________
> Pytables-users mailing list
> Pyt...@li...
> https://lists.sourceforge.net/lists/listinfo/pytables-users


-- 
Francesc Alted