[Numpy-discussion] More about data types in NumPy

Travis Oliphant oliphant.travis at ieee.org
Wed Sep 27 12:01:44 CDT 2006


Francesc Altet wrote:
> Hello,
>
> Sorry for being insistent, but I recognize that I'm having a bad time
> with NumPy data type rational. Is there an explanation for this?:
>
>   
Your actually talking about the array scalar types not the data-type 
objects. 

But, more to the point....

>>>> numpy.typeDict['i4']
>>>>         
> <type 'numpy.int32'>
>   
>>>> numpy.typeDict['int32']
>>>>         
> <type 'numpy.int32'>
>   
>>>> numpy.typeDict['i4'] == numpy.typeDict['int32']
>>>>         
> False
>
>   
On my 32-bit system I get:

numpy.sctypeDict['i4'] is numpy.sctypeDict['int32']

True


Hmm..... I don't know why you are getting a different result, but 
perhaps it has to do with the fact that the character alias ('i4') is 
not getting set at the same type as 'int32'.  I just fixed that.   That 
should fix the problem.

-travis







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