On Tue, Sep 29, 2009 at 12:23 PM, Robert Kern <robert.k...@gmail.com> wrote:
> On Tue, Sep 29, 2009 at 13:09, Charles R Harris > <charlesr.har...@gmail.com> wrote: > > > > > > On Tue, Sep 29, 2009 at 11:00 AM, Neal Becker <ndbeck...@gmail.com> > wrote: > >> > >> fixed_pt arrays need to apply the overflow_policy after operations > >> (overflow_policy could be clip, or throw exception). > >> > >> I thought __array_wrap__ would work for this, but it seems to not be > >> called > >> when I need it. For example: > >> > >> In [13]: obj > >> Out[13]: fixed_pt_array([ 0, 32, 64, 96, 128]) > >> > >> In [14]: obj*100 < this should overflow > >> enter: [ 0 32 64 96 128] << on entry into __array_wrap > >> enter: [0 32 64 96 128] > >> exit: [ 0 32 64 96 128] > >> Out[14]: fixed_pt_array([ 0, 3200, 6400, 9600, 12800]) > >> > >> Apparantly, obj*100 is never passed to array_wrap. > >> > >> Is there another way I can do this? > >> > > I believe array wrap has to be explicitly called after the fact. > > Ufuncs call __array_wrap__ implicitly. > > Thanks for the info. How do they decide which one to call? Chuck
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