From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Date: Thu, 21 Oct 2021 22:08:36 +0000 (-0700) Subject: bpo-44344: Document that pow can return a complex number for non-complex inputs.... X-Git-Tag: v3.9.8~43 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c53428fe8980aab6eda3e573bafed657e6798e6e;p=thirdparty%2FPython%2Fcpython.git bpo-44344: Document that pow can return a complex number for non-complex inputs. (GH-27853) (GH-29134) Co-authored-by: Łukasz Langa (cherry picked from commit 887a55705bb6c05a507c2886c9978a9e0cff0dd7) Co-authored-by: Mark Dickinson --- diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index b17ca69760db..942ad6fab85c 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1299,7 +1299,10 @@ 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