Antoine Pitrou <pit...@free.fr> added the comment:
> > len(data) will raise anyway.
>
> No, it won't, if the iterable happens to be a sequence.
Well, it seems the patch is confused between iterable and iterator. Only
iterators have a __next__, but they usually don't have a __len__.
The patch should really check for iterables, so it should use:
if isinstance(data, collections.Iterable)
raise ValueError#etc.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue3243>
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