Hi! Can someone here shed some light on this behavior:
> tst = np.zeros(2,[('a',np.int32),('b','S04')])
> np.random.shuffle(tst) # this works fine
> tst2 = np.zeros(2,[('a',np.int32),('b',list)])
> np.random.shuffle(tst2)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/ctw/<ipython console> in <module>()
/home/ctw/mtrand.pyx in mtrand.RandomState.shuffle()
ValueError: tried to set void-array with object members using buffer.
I get the same error if I use np.ndarray instead of list. Also, when I
put in a class I locally define I get a "data type not understood"
error:
> class tstcls:
> pass
> tst4 = np.zeros(2,[('a',np.int32),('b',tstcls)])
<class __main__.tstcls at
0x944a7dc>---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/ctw/<ipython console> in <module>()
TypeError: data type not understood
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