[Numpy-discussion] Assigning an array to the field of a structure doesn't work

[Jeremy Lewi]

Hi

   I'm trying to understand the following code:

 

    import numpy as np

 

    dt=np.dtype([("c",np.int32,(2))])

    

    data=np.ndarray([2],dtype=dt)

    

    x=np.array([0,10])

 

    #the following line doesn't set data[0]["c"] = x

    #only data[0]["c"][0] changes    

    data[0]["c"]=x

    

    #the following does set data[1]["c"][:]=x

    data[1]["c"][:]=x

    

 

What I don't understand is why does, the assignment of data[0]["c"]=x not
set c=x but the second one does?

 

Thanks

Jeremy            

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