From b7c0f17b730500dabad6694398a3dfc3762b529d Mon Sep 17 00:00:00 2001 From: Kriyszig Date: Fri, 21 Jun 2019 01:20:56 +0530 Subject: [PATCH] bpo-37353: Updated note about backwards compatiblity Backward compatiblity of source code isn't guarenteed. --- Doc/library/parser.rst | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/Doc/library/parser.rst b/Doc/library/parser.rst index a302681eca0568..1d2da300709c87 100644 --- a/Doc/library/parser.rst +++ b/Doc/library/parser.rst @@ -51,7 +51,8 @@ Python version to another as source text will always allow correct parse trees to be created in the target version, with the only restriction being that migrating to an older version of the interpreter will not support more recent language constructs. The parse trees are not typically compatible from one -version to another, whereas source code has always been forward-compatible. +version to another, though source code has usually been forward-compatible within +a major release series. Each element of the sequences returned by :func:`st2list` or :func:`st2tuple` has a simple form. Sequences representing non-terminal elements in the grammar