Are you sure fromiter doesn't make an intermediate list or equivalent? It has to collect all the values before it can know the shape or dtype of the array to put them in.
On Nov 4, 2016 5:26 AM, "Francesc Alted" <[email protected]> wrote: 2016-11-04 13:06 GMT+01:00 Neal Becker <[email protected]>: > I find I often write: > np.array ([some list comprehension]) > > mainly because list comprehensions are just so sweet. > > But I imagine this isn't particularly efficient. > Right. Using a generator and np.fromiter() will avoid the creation of the intermediate list. Something like: np.fromiter((i for i in range(x))) # use xrange for Python 2 > > I wonder if numpy has a "better" way, and if not, maybe it would be a nice > addition? > > _______________________________________________ > NumPy-Discussion mailing list > [email protected] > https://mail.scipy.org/mailman/listinfo/numpy-discussion > -- Francesc Alted _______________________________________________ NumPy-Discussion mailing list [email protected] https://mail.scipy.org/mailman/listinfo/numpy-discussion
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