[Numpy-discussion] print array in a form that can then be input

Daπid davidmenhur@gmail....
Sat Oct 20 06:40:48 CDT 2012


For the case of a small array, you can use repr(). This will work as
long as the array is not clipped (it is small enough).

>>> a=np.arange(10)
>>> print a
[0 1 2 3 4 5 6 7 8 9]
>>> repr(a)
'array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])'


>>> a=np.arange(10000)
>>> a.resize((100,100))
>>> print a
[[   0    1    2 ...,   97   98   99]
 [ 100  101  102 ...,  197  198  199]
 [ 200  201  202 ...,  297  298  299]
 ...,
 [9700 9701 9702 ..., 9797 9798 9799]
 [9800 9801 9802 ..., 9897 9898 9899]
 [9900 9901 9902 ..., 9997 9998 9999]]
>>> repr(a)
'array([[   0,    1,    2, ...,   97,   98,   99],\n       [ 100,
101,  102, ...,  197,  198,  199],\n       [ 200,  201,  202, ...,
297,  298,  299],\n       ..., \n       [9700, 9701, 9702, ..., 9797,
9798, 9799],\n       [9800, 9801, 9802, ..., 9897, 9898, 9899],\n
 [9900, 9901, 9902, ..., 9997, 9998, 9999]])'


David.

On Sat, Oct 20, 2012 at 1:11 PM, Neal Becker <ndbecker2@gmail.com> wrote:
> I find it annoying that in casual use, if I print an array, that form can't be
> directly used as subsequent input (or can it?).
>
> What do others do about this?  When I say casual, what I mean is, I write some
> long-running task and at the end, print some small array.  Now I decide I'd like
> to cut/paste that into a new program.
>
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