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

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 wrote:

On 8/29/06, Torgil Svensson 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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