On Fri, 15 Jun 2018 14:38:22 -0300 Andre Roberge <andre.robe...@gmail.com> wrote: > > Here's a sample session for demonstration purpose... > > $ python -m experimental > experimental console version 0.9.5. [Python version: 3.6.1] > > ~~> 0.1 + 0.2 > 0.30000000000000004 > ~~> 0.1 + 0.2 == 0.3 > False > ~~> from __experimental__ import approx > ~~> 0.1 + 0.2 ~= 0.3 # use approximately equal operator > True > ~~> 0.1 + 0.2 <~= 0.3 > True > ~~> 0.1 + 0.2 >~= 0.3 > True > ~~> 2 ** 0.5 > 1.4142135623730951 > ~~> 2**0.5 ~= 1.414 > False > ~~> set_tols(0.001, 0.001) > ~~> 2**0.5 ~= 1.414 > True
On the one hand, this matches the corresponding math notation quite pleasantly. On the other hand, it doesn't seem so useful that it deserves to be a builtin operator. I'm also not sure we want to encourage its use for anything other than experimenting at the prompt and writing unit tests. Being able to set a global tolerance setting is an anti-pattern IMHO, regardless of the operator proposal. Regards Antoine. _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
