Tim Peters added the comment: Huh! I thought everyone in Standards World gave up by now, and agreed 0**0 should be 1. ---------- nosy: +tim.peters _______________________________________ Python tracker https://bugs.python.org/issue41205 _______________________________________

Mark Dickinson added the comment: I agree that the result is surprising and should be noted in the docs; we shouldn't expect all the decimal users to be familiar with the specification. Some of the other differences with float arithmetic *are* noted (e.g., the behaviour of `//` and `%`), but apparently not this one. We do document the behaviour of these corner cases for `math.pow`. The part that I find really odd is that the specification says that `Decimal("inf")**Decimal(0)` is `1`. Treating one of 0**0 and inf**0 as undefined but not the other seems inconsistent to me. We'd probably want to note the behaviour of inf**0 in the docs, too. (I tried to argue with Mike Cowlishaw about this, but I lost.) I'm not sure whether just noting this in the "power" documentation is enough: it's not clear to me that users using the ** operator would think to check the docs for the "power" method. The other weirdly non-IEEE 754 behaviour (again, mandated by the standard) that bugs me from time to time is that the unary `-` and `+` operators will never give negative zero: Decimal("-0.0") and -Decimal("0.0") are not the same thing. That one's probably worth noting, too. ---------- _______________________________________ Python tracker https://bugs.python.org/issue41205 _______________________________________

Mark Dickinson added the comment: @JD-Veiga: would you be willing to work on a PR? ---------- _______________________________________ Python tracker https://bugs.python.org/issue41205 _______________________________________

Stefan Krah added the comment: New changeset 10e466448f67850ed7bb2e2a4e7f017f2b050cad by Srinivas Reddy Thatiparthy (శ్రీనివాస్ రెడ్డి తాటిపర్తి) in branch 'master': bpo-41205: Document Decimal power 0 to the 0 (GH-21386) https://github.com/python/cpython/commit/10e466448f67850ed7bb2e2a4e7f017f2b0... ---------- _______________________________________ Python tracker https://bugs.python.org/issue41205 _______________________________________

Change by miss-islington : ---------- pull_requests: +20690 pull_request: https://github.com/python/cpython/pull/21548 _______________________________________ Python tracker https://bugs.python.org/issue41205 _______________________________________

miss-islington added the comment: New changeset dac8a3a15647d016842e2ae7284cefa27ce5e838 by Miss Islington (bot) in branch '3.8': bpo-41205: Document Decimal power 0 to the 0 (GH-21386) https://github.com/python/cpython/commit/dac8a3a15647d016842e2ae7284cefa27ce... ---------- _______________________________________ Python tracker https://bugs.python.org/issue41205 _______________________________________