From d9503c307a8b6a7b73f6344183602ffb014d3356 Mon Sep 17 00:00:00 2001 From: Paul Ganssle Date: Fri, 8 Feb 2019 11:02:00 -0500 Subject: Add What's New entry for date subclass behavior (#11790) This was a backwards incompatible change and should be clearly noted. Related bugs: bpo-32417: https://bugs.python.org/issue32417 bpo-35364: https://bugs.python.org/issue35364 --- Doc/whatsnew/3.8.rst | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index a90bc27..740c608 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -115,6 +115,14 @@ Other Language Changes a :exc:`SyntaxWarning` instead. (Contributed by Serhiy Storchaka in :issue:`32912`.) +* Arithmetic operations between subclasses of :class:`datetime.date` or + :class:`datetime.datetime` and :class:`datetime.timedelta` objects now return + an instance of the subclass, rather than the base class. This also affects + the return type of operations whose implementation (directly or indirectly) + uses :class:`datetime.timedelta` arithmetic, such as + :meth:`datetime.datetime.astimezone`. + (Contributed by Paul Ganssle in :issue:`32417`.) + New Modules =========== -- cgit v0.12