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Wed Aug 11 23:37:24 CEST 2010 · https://mail.python.org/pipermail/python-dev/2010-August/103023.html

On 8/11/2010 3:16 PM, Raymond Hettinger wrote:

> The ability to introspect is basic to Python's design.
> Objects know their class, functions know their code objects,
> bound methods know both their underlying function,
> classes know their own class dictionary, etc.

Should iterators know their iterable when there is one?

There is or was a request for this on python-list, I believe, a few days 
ago. I suggested bad idea because
a) iterator requirement is intentially minimal
b) not all iterators have underlying object
c) OP wanted to mutate underlying object (list) while iterating
I did give a my_iter class that would do what OP wanted.

-- 
Terry Jan Reedy

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[Python-Dev] Proposed tweaks to functools.wraps