On Sun, Feb 14, 2016 at 11:41 PM, Antony Lee <antony....@berkeley.edu> wrote:
> So how can np.array(range(...)) even work? > range() (in py3) is not a generator, nor is is a iterator. it is a range object, which is lazily evaluated, and satisfies both the iterator protocol and the sequence protocol (at least most of it: In [*1*]: r = range(10) In [*2*]: r[3] Out[*2*]: 3 In [*3*]: len(r) Out[*3*]: 10 In [*4*]: type(r) Out[*4*]: range In [*9*]: isinstance(r, collections.abc.Sequence) Out[*9*]: True In [*10*]: l = list() In [*11*]: isinstance(l, collections.abc.Sequence) Out[*11*]: True In [*12*]: isinstance(r, collections.abc.Iterable) Out[*12*]: True I'm still totally confused as to why we'd need to special-case range when we have arange(). -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception chris.bar...@noaa.gov
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