On 5/25/2010 1:09 PM, Terry Reedy wrote:
On 5/25/2010 3:08 AM, Peter Otten wrote:
Michele Simionato wrote:
I think not turning the list-comp into syntactic sugar for
list(genexp) in
py3 is a missed opportunity.
Implementing it that way was tried but was much slower than the current
implementation. If one uses StopIteration as it is intended to be used
(and is so documented), then, I believe, they are equivalent. There was
a conscious decision to not slow comprehensions for the many to cater to
the very few.
And those few can always write list(genexp) instead of [genexp] (or
set...) when the minute difference actually matters.
Terry Jan Reedy
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