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[Python-Dev] PEP 572: Assignment Expressions

MRAB python at mrabarnett.plus.com
Tue Apr 24 14:10:36 EDT 2018 
On 2018-04-21 03:15, Tim Peters wrote:
> [Tim]
> >> And I'll take this opportunity to repeat the key point for me:  I
> >> tried hard, but never found a single case based on staring at real
> >> code where allowing _fancier_ (than "plain name") targets would be a
> >> real improvement.  In every case I thought it _might_ help, it turned
> >> out that it really didn't unless Python _also_ grew an analog to C's
> >> "comma operator" (take only the last result from a sequence of
> >> expressions).  I'll also note that I asked if anyone else had a
> >> real-life example, and got no responses.
>
> [MRAB <python at mrabarnett.plus.com>]
> > Could a semicolon in a parenthesised expression be an equivalent to C's
> > "comma operator"?
>
> I expect it could, but I it's been many years since I tried hacking
> Python's grammar, and I wouldn't want a comma operator anyway ;-)
[snip]
Just reading this:

https://www.bfilipek.com/2018/04/refactoring-with-c17-stdoptional.html

about C++17, and what did I see? An example with a semicolon in parentheses!
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