[Numpy-discussion] recarray fun
Stéfan van der Walt
stefan@sun.ac...
Thu May 1 17:36:26 CDT 2008
2008/5/1 Travis E. Oliphant <oliphant@enthought.com>:
> Stéfan van der Walt wrote:
>
>
> > 2008/5/1 Travis E. Oliphant <oliphant@enthought.com>:
> >
> >> > OK, I see your point. I'm working on a patch that does the following:
> >> >
> >> > def view(type_or_dtype=None, dtype=None, type=None):
> >> > if type_or_dtype:
> >> > if dtype:
> >> > raise ValueError("Cannot specify dtype twice")
> >> > if type:
> >> > raise ValueError("Cannot specify type twice")
> >> >
> >> > if isinstance(type_or_dtype,py_type):
> >> > type = type_or_dtype
> >> >
> >> > if isinstance(type_or_dtype,numpy_dtype):
> >> > dtype = type_or_dtype
> >> >
> >> > return x.view(type=type).view(dtype=dtype)
> >> >
> >> > Would that be a satisfying solution? I'll be back around 21:00 SAST
> >> > to attend to the matter.
> >> >
> >>
> >> Yes, I think that would work. You need to do some checking for
> >> type=None and dtype=None as well, though.
> >>
> >> That way, the first argument would continue to work as now but be
> >> labeled correctly, but it would also support dtype= and type= keywords.
> >>
> >
> > Please review http://projects.scipy.org/scipy/numpy/changeset/5117.
> >
> >
> Check out
>
> http://projects.scipy.org/scipy/numpy/changeset/5119
I think that's fine. It doesn't support weird combinations like
x.view(np.matrix,dtype=np.int32)
but people probably shouldn't do that anyway.
Cheers
Stéfan
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