From c9e7f24d0a2f5559a778448cf33c6022b9677a2b Mon Sep 17 00:00:00 2001 From: Mark Dickinson Date: Thu, 21 Oct 2021 21:57:49 +0100 Subject: [PATCH] bpo-44344: Document that pow can return a complex number for non-complex inputs. (GH-27853) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Co-authored-by: Łukasz Langa (cherry picked from commit 887a55705bb6c05a507c2886c9978a9e0cff0dd7) Co-authored-by: Mark Dickinson --- Doc/library/functions.rst | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index f4c3ef4600f6b7..689455409eec38 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1357,7 +1357,10 @@ are always available. They are listed here in alphabetical order. operands, the result has the same type as the operands (after coercion) unless the second argument is negative; in that case, all arguments are converted to float and a float result is delivered. For example, ``pow(10, 2)`` - returns ``100``, but ``pow(10, -2)`` returns ``0.01``. + returns ``100``, but ``pow(10, -2)`` returns ``0.01``. For a negative base of + type :class:`int` or :class:`float` and a non-integral exponent, a complex + result is delivered. For example, ``pow(-9, 0.5)`` returns a value close + to ``3j``. For :class:`int` operands *base* and *exp*, if *mod* is present, *mod* must also be of integer type and *mod* must be nonzero. If *mod* is present and