Re: [Numpy-discussion] Suppressing "nesting" (recursion, descent) in array construction.

El dj 21 de 06 del 2007 a les 06:24 -0700, en/na Michael McNeil Forbes va escriure:

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key_array = empty(len(keys),dtype=tuple) key_array[:] = keys[:]

the later two statements can also be written as:

key_array = array(keys, dtype=tuple)

These are not equivalent:

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keys = [('a',1),('b',2)] key_array = array(keys, dtype=tuple) key_array

array([[a, 1], [b, 2]], dtype=object)

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key_array = empty(len(keys),dtype=tuple) key_array[:] = keys[:] key_array

array([('a', 1), ('b', 2)], dtype=object)

Ops. You are right. I think I was fooled by the 'dtype=tuple' argument which is in fact equivalent to 'dtype=object'.