See this issue: https://github.com/numpy/numpy/issues/5543
There was also a very thorough discussion of this recently on this mailing list: http://numpy-discussion.10968.n7.nabble.com/Proposal-to-support-format-td43931.html On Tue, Feb 28, 2017 at 11:32 AM Ryan May <rma...@gmail.com> wrote: > Hi, > > Can someone take a look at: https://github.com/numpy/numpy/issues/7978 > > The crux of the issue is that this: > > # This works > a = "%0.3g" % np.array(2) > a > '2' > > # This does not > a = "{0:0.3g}".format(np.array(2)) > TypeError: non-empty format string passed to object.__format__ > > I've now hit this in my code. If someone can even point me in the general > direction of the code to dig into for this (please let it be python, please > let it be python...), I'll dig in more. > > Ryan > > -- > Ryan May > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > https://mail.scipy.org/mailman/listinfo/numpy-discussion >
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