On Mon, Jan 07, 2019 at 07:35:45PM +0000, MRAB wrote: > Could the functions optionally accept a callback that will be called > when a NaN is first seen? > > If the callback returns False, NaNs are suppressed, otherwise they are > retained and the function returns NaN (or whatever).
That's an interesting API which I shall have to think about. > The callback would give the user a chance to raise a warning or an > exception, if desired. One practical annoyance of this API is that you cannot include raise from a lambda, so people desiring "fail fast" semantics can't do this: result = mean(data, callback=lambda: raise Exception) They have to pre-declare the callback using def. -- Steve _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
