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

...

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:

...

...

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

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

...

...

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

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

Thanks, Michael.