23.02.18 19:30, Guido van Rossum пише:
I'm not saying anything new here, but since you asked specifically for
my opinion: I don't care for the idiom; it's never occurred to me
before, and it smells of cleverness. If I saw it in a code review I
would probably ask for a regular for-loop to make the code more
maintainable.
But if you say it's useful for some class of users and it would be more
useful if it was faster, I'm fine with the optimization. The
optimization is also clever, and here I appreciate cleverness!
Thank you. Given the contradictory relation of other core developers to
this idiom, and small total effect of this optimization (since the
problem solved by using this idiom is rarely occurred), I'm inclined to
defer this optimization on to some time (months or years). Maybe
something will be changed during this period: either this idiom will
become more popular, or new arguments against using it will be found, or
better solution will be found, or this optimization will become the part
of more general optimization.
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