From 9a2f25d374f027f6509484d66e1c7bba03977b99 Mon Sep 17 00:00:00 2001 From: Terry Jan Reedy Date: Sun, 12 Nov 2023 19:06:50 -0500 Subject: gh-111944: Add assignment expression parentheses requirements (#111977) gh-111944: Clarify where assignment expressions require ()s Augment the list of places where parentheses are required around assignnment statements. In particular, 'a := 0' and 'a = b := 1' are syntax errors. --- Doc/reference/expressions.rst | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst index 88d4fca..14c2afa 100644 --- a/Doc/reference/expressions.rst +++ b/Doc/reference/expressions.rst @@ -1781,10 +1781,11 @@ Or, when processing a file stream in chunks: while chunk := file.read(9000): process(chunk) -Assignment expressions must be surrounded by parentheses when used -as sub-expressions in slicing, conditional, lambda, -keyword-argument, and comprehension-if expressions -and in ``assert`` and ``with`` statements. +Assignment expressions must be surrounded by parentheses when +used as expression statements and when used as sub-expressions in +slicing, conditional, lambda, +keyword-argument, and comprehension-if expressions and +in ``assert``, ``with``, and ``assignment`` statements. In all other places where they can be used, parentheses are not required, including in ``if`` and ``while`` statements. -- cgit v0.12