Just noting some real code I typed today where `given` works great if
it allows unpacking syntax, and assignment expressions don't:
while True:
head, matched, s = s.partition(sep)
if not matched:
break
Using `given`:
while matched given head, matched, s = s.partition(sep):
Typing "matched " twice still sucks, though;-)
It doesn't work as well with assignment expressions even if they were
(re)generalized to allow unpacking syntax. In this specific case, I'd
keep the original loop-and-a-half rather than do:
while (t := s.partition(sep})[1]:
head, matched, s = t
With unpacking syntax restored, same answer:
while (head, matched, s := s.partition(sep})[1]:
or
while [(head, matched, s := s.partition(sep}), matched][-1]:
to combine the worst annoyances of everything and add another ;-)
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