[Python-Dev] PEP 3142: Add a "while" clause to generator expressions
gerald.britton at gmail.com
Tue Jan 20 15:24:32 CET 2009
if n*n < 50 or raise StopIteration()
really mean, "Return an integer in the range 0-99 if n-squared is less
than fifty or the statement 'raise StopIteration()' returns True" ?
I'm not sure that that will work.
On Tue, Jan 20, 2009 at 9:18 AM, <python-3000 at udmvt.ru> wrote:
> On Mon, Jan 19, 2009 at 10:10:00AM -0500, Gerald Britton wrote:
>> Please find below PEP 3142: Add a "while" clause to generator
>> expressions. I'm looking for feedback and discussion.
>> g = (n for n in range(100) while n*n < 50)
> May I suggest you this variant?
> def raiseStopIteration():
> raise StopIteration
> g = (n for n in range(100) if n*n < 50 or raiseStopIteration())
> Well, there are more characters...
> But it is not using any syntax changes and does not require any approval
> to be functional. Yet it is as fast as the proposed variant, does not require
> modules and, I hope, will not confuse you or anyone else.
> Alexey G. Shpagin
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