[Python-ideas] PEP 572: Assignment Expressions (post #4)

[Guido van Rossum]

Regarding the precedence of :=, at this point the only acceptable outcome
for me is one where at the statement level, := and = can be used
interchangeably and will have the same meaning (except probably we wouldn't
allow combining both in a chained assignment). Because then we can say "and
you can use assignment in expressions too, except there you must use :=
because = would be too easily confused with ==".

Ideally this would allow all forms of = to be replaced with :=, even
extended structure unpacking (a, b, *c := foo()).

-- 
--Guido van Rossum (python.org/~guido)
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