I want to create an array with dtype=np.object
, where each element is an array with a numerical type, e.g int or float. For example:
>>> a = np.array([1,2,3])
>>> b = np.empty(3,dtype=np.object)
>>> b[0] = a
>>> b[1] = a
>>> b[2] = a
Creates what I want:
>>> print b.dtype
object
>>> print b.shape
(3,)
>>> print b[0].dtype
int64
but I am wondering whether there isn't a way to write lines 3 to 6 in one line (especially since I might want to concatenate 100 arrays). I tried
>>> b = np.array([a,a,a],dtype=np.object)
but this actually converts all the elements to np.object:
>>> print b.dtype
object
>>> print b.shape
(3,)
>>> print b[0].dtype
object
Does anyone have any ideas how to avoid this?
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