Alternative iterator syntax

[Aahz Maruch]

In article <mailman.982769240.31345.python-list at python.org>,
Huaiyu Zhu  <hzhu at users.sourceforge.net> wrote:
>
>  [...]

I'm not sure where to put this question, so I'm just deleting all of
Huaiyu's text.

How does one get UserDict.keys (note: no parens here) to return an
iterator?  Normally this will simply return a reference to the method.
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