Walk through dictionary keys?

[Fredrik Lundh]

Carsten Gaebler wrote:
> Is there a way of 'walking' through the keys of a dictionary?

keys()

> If I have a large dictionary I'd like to prevent
>
> for key in d.keys():
>     do_something
>
> because this makes a copy of all the keys.

wrong.  it creates references to all the keys, not
copies of them.

</F>

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