On Tue, Apr 5, 2011 at 1:02 PM, Christopher Barker <[email protected]> wrote: > HI folks, > > What's the fastest way to convert a numpy array to tuples? > > Unfortunately, not all packages take arbitrary sequences when they are > expecting a list of tuples. In this case, I'm using PIL's ImageDraw, and > want to do: > > draw.line(points) > > (points is an Nx2 numpy array of ints) > > but if I pass in an array, I get, oddly enough, nothing. NO error, just > nothing drawn. > > if I do: > > draw.line(points.tolist()) > > SystemError: new style getargs format but argument is not a tuple > > So I seem to need tuples. This works: > > draw.line([tuple(p) for p in points.tolist()]) > > but that seems like it would be slower than it should be (to be honest, > not profiled). > > Is there a faster way? > > Maybe numpy should have a ndarray.totuple() method.
does a structured dtype work? Josef > > -Chris > > > > > > > -- > 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 > > [email protected] > _______________________________________________ > NumPy-Discussion mailing list > [email protected] > http://mail.scipy.org/mailman/listinfo/numpy-discussion > _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
