[Numpy-discussion] fromiter shape argument -- was Re: For loop tips

[Torgil Svensson]

>    return uL,asmatrix(fromiter((idx[x] for x in L),dtype=int))

Is it possible for fromiter to take an optional shape (or count)
argument in addition to the dtype argument? If both is given it could
preallocate memory and we only have to iterate over L once.

//Torgil

On 8/29/06, Keith Goodman <kwgoodman at gmail.com> wrote:
> On 8/29/06, Torgil Svensson <torgil.svensson at gmail.com> wrote:
> > something like this?
> >
> > def list2index(L):
> >    uL=sorted(set(L))
> >    idx=dict((y,x) for x,y in enumerate(uL))
> >    return uL,asmatrix(fromiter((idx[x] for x in L),dtype=int))
>
> Wow. That's amazing. Thank you.
>
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