storing large amounts of data in a list/dictionary

flamesrock flamesrock at gmail.com
Sat Mar 12 05:59:46 CET 2005


Thanks for the reply ;)

I was hoping not to complicate things with zope, tho Btrees look
interesting.

Oh - and about the xml, I'm using something very similar to elementree
which I found in the python cookbook:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/157358

Bruno Desthuilliers wrote:
> flamesrock a écrit :
> > Hi,
> >
> > Basically, what I'm trying to do is store large amounts of data in
a
> > list or dictionary and then convert that to a custom formatted xml
> > file.
> >
> > My list looks roughly like this:
> > (d[],r[c[d[p[],p[R,C,I]]]])
> >
> > My question is, would it be faster to use a dictionary if the
elements
> > of the lists have to be put in alphebetical order,
>
>  >>> d = {"e" : 32, "f": 44, "a" : 1, "z" : 99}
>  >>> for k in d: print k
> ...
> a
> z
> e
> f
>
> Well... Just *don't* rely on *any* order with dicts.
>
> If you need fast keyed access to a very large dataset, you may want
to
> have a look at btrees (one possible implementation here :
> http://zopewiki.org/BTree).
>
> Now since it's XML related, this may also (or not) be useful:
> http://effbot.org/zone/celementtree.htm
> http://effbot.org/zone/element-index.htm
> 
> HTH
> Bruno




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