> With regard to generator expressions, isn't Guido leaning
> back towards not having any variable capture?
Right.
> Or is he un-leaning-back again? This is all getting very
> confusing...
Paul Dubois told me he thought that an example I used in my keynote
today (which would fail without capture) would be an attractive
nuisance for scientists (since it looked just like a reasonable way to
compute an outer product). I'm not sure the argument holds, because
an outer product would typically be created as a list of lists, not a
list of generators.
The example I used was:
F = []
for i in range(10):
F.append(x*i for x in range(10))
It would end up creating 10 generators referencing the variable i with
value 9.
The version using list comprehensions of course works:
F = []
for i in range(10):
F.append([x*i for x in range(10)])
--Guido van Rossum (home page: http://www.python.org/~guido/)
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