[Numpy-discussion] attributes of scalar types - e.g. numpy.int32.itemsize

Sebastian Haase haase at msg.ucsf.edu
Fri Aug 18 15:16:15 CDT 2006


On Friday 18 August 2006 11:38, Travis Oliphant wrote:
> Sebastian Haase wrote:
> > Hi,
> > array dtype descriptors have an attribute itemsize  that gives the total
> > number of bytes required for an item of that dtype.
> >
> > Scalar types, like  numy.int32, also have that attribute,
> > but it returns "something else" - don't know what:
> >
> >
> > Furthermore there are *lot's*  of more attributes to a scalar dtype, e.g.
>
> The scalar types are actual Python types (classes) whereas the dtype
> objects are instances.
>
> The attributes you are seeing of the typeobject are very useful when you
> have an instance of that type.
>
> With numpy.int32.itemsize you are doing the equivalent of
> numpy.dtype.itemsize

but why then do I not get the result 4 ?

-Sebastian




More information about the Numpy-discussion mailing list