Re: [Numpy-discussion] three-dim array

On 27/12/18 3:21 am, Benjamin Root wrote:

Ewww, kinda wish that would be an error... It would be too easy for a typo to get accepted this way.

On Wed, Dec 26, 2018 at 1:59 AM Eric Wieser <wieser.eric+numpy@gmail.com mailto:wieser.eric%2Bnumpy@gmail.com> wrote:

In the latest version of numpy, this runs without an error,
although may or may not be what you want:

|In [1]: np.array([[1,2],[[1,2],[3,4]]]) Out[1]: array([[1, 2],
[list([1, 2]), list([3, 4])]], dtype=object) |

Here the result is a 2x2 array, where some elements are numbers
and others are lists.

​

Specify the dtype explicitly: `dtype=int` or so, then NumPy will refuse to create a ragged array.

There has been occasional discussion of `dtype='not-object'`, but I don't think it resulted in an issue or PR.

Matti