Just van Rossum <just@letterror.com> writes:
> Alex Martelli wrote:
>
> > class Outer:
> > [snip snip]
> > def __iter__(self):
> > class Inner:
> > def __init__(self, outer):
> > self.outer = outer
> > def __iter__(self):
> > return self
> > def next(self):
> > if self.outer.isAtEnd():
> > raise StopIteration
> > else:
> > result = self.outer.currentState()
> > self.outer.advanceState()
> > return result
> > return Inner(self)
>
> While I'm sure this was just a theoretical example, _this_ specific case is much
> easier written as a generator (and I _love_ the idiom of making the __iter__
> method a generator, I think it's underused...).
>
> class Outer:
> [snip snip]
> def __iter__(self):
> while not self.isAtEnd():
> result = self.outer.currentState()
> self.outer.advanceState()
> yield result
This only works for 'self-iterable' types like files, right?
--
David Abrahams
dave@boost-consulting.com * http://www.boost-consulting.com
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