On 9 September 2012 00:10, Warren Weckesser <warren.weckes...@enthought.com> wrote: > > > On Sat, Sep 8, 2012 at 4:56 PM, nicky van foreest <vanfore...@gmail.com> > wrote: >> >> Hi, >> >> I ran the following code: >> >> args = np.array([4,8]) >> print np.sum( (arg > 0) for arg in args) >> print np.sum([(arg > 0) for arg in args]) >> print np.prod( (arg > 0) for arg in args) >> print np.prod([(arg > 0) for arg in args]) >> >> with this result: >> >> 2 >> 1 > > > > I get 2 here, not 1 (numpy version 1.6.1).
Sorry. Typo. > > >> >> <generator object <genexpr> at 0x1c70410> >> 1 >> >> Is the difference between prod and sum intentional? I would expect >> that numpy.prod would also work on a generator, just like numpy.sum. > > > > Whatever the correct result may be, I would expect them to have the same > behavior with respect to a generator argument. > > >> >> BTW: the last line does what I need: the product over the truth values >> of all elements of args. Is there perhaps a nicer (conciser) way to >> achieve this? Thanks. > > > > How about: > > In [15]: np.all(args > 0) > Out[15]: True > > > Warren > > > >> >> Nicky >> >> _______________________________________________ >> NumPy-Discussion mailing list >> NumPy-Discussion@scipy.org >> http://mail.scipy.org/mailman/listinfo/numpy-discussion > > > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
