[Python-Dev] PEP 572: Assignment Expressions

[Christoph Groth]

Ethan Furman wrote:
> On 04/20/2018 11:15 AM, Christoph Groth wrote:
> > Nick Coghlan wrote:
> >
> >> I also think that if "=" and ":=" both target the same kind of scope,
> >> there isn't enough new expressiveness introduced by the latter to
> >> justify the syntactic complexity of adding it.
> >
> > OK, but then how about introducing assignment expressions with the "="
> > operator but *requiring* extra parens (similar to how modern C
> > compilers warn about assignment expressions without parens), e.g.
> 
> Using a single "=" for assignment expressions isn't going to happen.
> Period.

Huh, I didn't want to irritate anyone!

Guido wrote [1] on python-ideas:

> I also think it's fair to at least reconsider adding inline
> assignment, with the "traditional" semantics (possibly with mandatory
> parentheses).  This would be easier to learn and understand for people
> who are familiar with it from other languages (C++, Java, JavaScript).

I interpreted this in the way that he at least doesn't rule out "= with
parens" completely.  Perhaps he meant ":= with parens", but that would
seem redundant.

[1]
https://mail.python.org/pipermail/python-ideas/2018-March/049409.html