8000 np.diagonal returns non-writeable array in 1.10.1 · Issue #7010 · numpy/numpy · GitHub
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The-Fonz opened this issue Jan 14, 2016 · 1 comment
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np.diagonal returns non-writeable array in 1.10.1 #7010

The-Fonz opened this issue Jan 14, 2016 · 1 comment

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@The-Fonz
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Contrary to the docstring of np.diagonal, the returned array is non-writeable. The docstring says (predicts?) that for version 1.10 it is be writeable.

In [23]: np.version.full_version
Out[23]: '1.10.1'

In [24]: a = np.random.random(9).reshape((3,3))

In [25]: np.diagonal(a)[0] = 1
Traceback (most recent call last):

  File "<ipython-input-25-8277268b3e32>", line 1, in <module>
    np.diagonal(a)[0] = 1

ValueError: assignment destination is read-only
@njsmith
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njsmith commented Jan 14, 2016

Doh, yes, as you've guessed, that's just a forgotten message from the past
that should have gotten updated at some point but never did. It indeed is
not writeable in 1.10, and won't be writeable in 1.11 either given that
we're only a few days from branching and haven't talked about it at all.
I'll submit a patch to fix the message.
On Jan 14, 2016 10:30 AM, "Fons" notifications@github.com wrote:

Contrary to the docstring of npdiagonal, the returned array is
non-writeable The docstring says (predicts?) that for version 110 it is be
writeable

In [23]: npversionfull_version
Out[23]: '1101'

In [24]: a = nprandomrandom(9)reshape((3,3))

In [25]: npdiagonal(a)[0] = 1
Traceback (most recent call last):

File "", line 1, in
npdiagonal(a)[0] = 1

ValueError: assignment destination is read-only

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#7010.

njsmith added a commit to njsmith/numpy that referenced this issue Jan 15, 2016
@njsmith
DOC: Clean up/fix several references to the "future" 1.10 release
c0f6c37 
Fixes numpygh-7010
@njsmith njsmith mentioned this issue Jan 15, 2016
Merged
jaimefrio pushed a commit to jaimefrio/numpy that referenced this issue Mar 22, 2016
@njsmith @jaimefrio
DOC: Clean up/fix several references to the "future" 1.10 release
3b80d51 
Fixes numpygh-7010
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