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From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.python
Subject: Re: dictionary size changed during iteration
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Date: Sun, 08 May 2011 12:42:23 -0700
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:4964

Hans Mulder <hansmu@xs4all.nl> writes:
> How about:
> 	changes = filter(is_bad, d)
> Or would that be too compact?

I thought of writing something like that but filter in python 3 creates
an iterator that would have the same issue of walking the dictionary
while the dictionary is mutating.

    changes = list(filter(is_bad, d))

should work.