[Numpy-discussion] real and imag functions should produce errors for object arrays

Benjamin Root ben.root@ou....
Tue Sep 21 17:23:08 CDT 2010


On Tue, Sep 21, 2010 at 4:44 PM, Benjamin Root <ben.root@ou.edu> wrote:

> On Tue, Sep 21, 2010 at 4:31 PM, Michael Gilbert <
> michael.s.gilbert@gmail.com> wrote:
>
>> Hi,
>>
>> The following example demonstrates a rather unexpected result:
>>
>> >>> import numpy
>> >>> x = numpy.array( complex( 1.0 , 1.0 ) , numpy.object )
>> >>> print x.real
>> (1+1j)
>> >>> print x.imag
>> 0
>>
>> Shouldn't real and imag return an error in such a situation?
>>
>> Thanks,
>> Mike
>>
>
> Don't use 'numpy.object'.  Because complex is a  numerical type, numpy can
> handle it just fine.  By setting dtype to numpy.object, numpy then treats it
> like an object rather than a numerical.
>
> x = numpy.array( complex(1.0, 1.0) )
>
> should work just fine.
>
> I hope that helps!
> Ben Root
>
>
I see that I have interpreted this thread as "Doctor, it hurts when I do
this...  Well, don't do that!"  Sorry for the noise.

Ben Root
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