Re: [Numpy-discussion] How to trigger warnings for integer division in python 2
> I guess the question is whether we should aim to add at least some of > these warnings As you can probably guess, I think such a feature would be very useful :-) When my team started planning our migration to Python 3, we quickly realized that the integer division issue was our biggest risk. It has the potential for subtle bugs to remain hidden in our code base long after the migration, whereas most of the other Python 3 changes will be easier to identify. > and someone is willing to put in the effort (I suppose it is likely only a > few places). > I am not sure how easy they are on the C side, but probably not difficult > at all. OK, good to hear that it shouldn't be difficult. I've opened the following issue on the github repo, to continue this discussion and hopefully attract a volunteer. :-) https://github.com/numpy/numpy/issues/7949 Best regards, Stuart ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org https://mail.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] How to trigger warnings for integer division in python 2
On Fr, 2016-08-19 at 11:29 -0400, Stuart Berg wrote: > Hi, > > To help people migrate their code bases from Python 2 to Python 3, > the python interpreter has a handy option '-3' that issues warnings > at runtime. One of the warnings is for integer division: > > $ echo "print 3/2" > /tmp/foo.py > $ python -3 /tmp/foo.py > /tmp/foo.py:1: DeprecationWarning: classic int division > print 3/2 > 1 > > But no warnings are shown for division of numpy arrays, e.g. for a > statement like this: > print np.array([3]) / np.array([2]) > > I see that np.seterr can be used to issue certain types of division > warnings, but not this one. Is there a way to activate integer > division warnings? It would really help me migrate my application to > Python 3. > I don't think numpy implements any py3kwarnings. It seems that it would be possible though. On newer versions we got more strict about using floats instead of ints, so some of these places might follow up with a warning quickly. I guess the question is whether we should aim to add at least some of these warnings and someone is willing to put in the effort (I suppose it is likely only a few places). I am not sure how easy they are on the C side, but probably not difficult at all. - Sebastian > Thanks, > Stuart > ___ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > https://mail.scipy.org/mailman/listinfo/numpy-discussion signature.asc Description: This is a digitally signed message part ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org https://mail.scipy.org/mailman/listinfo/numpy-discussion
[Numpy-discussion] How to trigger warnings for integer division in python 2
Hi, To help people migrate their code bases from Python 2 to Python 3, the python interpreter has a handy option '-3' that issues warnings at runtime. One of the warnings is for integer division: $ echo "print 3/2" > /tmp/foo.py $ python -3 /tmp/foo.py /tmp/foo.py:1: DeprecationWarning: classic int division print 3/2 1 But no warnings are shown for division of numpy arrays, e.g. for a statement like this: print np.array([3]) / np.array([2]) I see that np.seterr can be used to issue certain types of division warnings, but not this one. Is there a way to activate integer division warnings? It would really help me migrate my application to Python 3. Thanks, Stuart ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org https://mail.scipy.org/mailman/listinfo/numpy-discussion
