[Numpy-discussion] dtype and dtype.char

Charles سمير Doutriaux doutriaux1@llnl....
Tue Sep 8 14:59:08 CDT 2009


Hi,

I'm testing our code on 64bit vs 32bit

I just realized that the dtype.car is platform dependent.

I guess it's normal

her emy little test:
for t in  
[numpy 
.byte 
,numpy 
.short 
,numpy 
.int 
,numpy 
.int32 
,numpy 
.float 
,numpy 
.float32 
,numpy 
.double,numpy.ubyte,numpy.ushort,numpy.uint,numpy.int64,numpy.uint64]:
     print 'Testing type:',t
     data = numpy.array([0], dtype=t)
     print data.dtype.char,data.dtype


On 64bit I get for numpy.unit64:
Testing type: <type 'numpy.uint64'>
L uint64

Whereas on 32bit i get
Testing type: <type 'numpy.uint64'>
Q uint64

Is it really normal? I guess that means I shouldn't expect the  
dtype.char to be the same on all platform....

Is that right?

C.



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